Month: May 2024

Reducing electricity consumption on the Isle of Eigg

Background
The Isle of Eigg is situated off the West Coast of Scotland, and is reached by ferry from the mainland. For the island community of about a hundred residents, it has always been expensive to import products, materials and skilled labour from the mainland, and this has encouraged a culture of self-sufficiency and careful use of resources. Today, although the island now has most modern conveniences, CO2 emissions per household are 20 percent lower than the UK average, and electricity use is 50 percent lower.

When Eigg designed its electricity grid, which was switched on in February 2008, it quickly became apparent that in order to keep the capital building costs down, it would be necessary to manage demand. This would also allow the island to generate most of its electricity from renewable sources, mainly water, wind and solar power. This goal was overseen by the Eigg Heritage Trust (EHT).

The technology
Eigg manages electricity demand mainly by capping the instantaneous power that can be used to five kilowatts (kW) for a household and ten kW for a business. If usage goes over the limit, the electricity supply is cut off and the maintenance team must be called to come and switch it back on again. All households and businesses have energy monitors, which display current and cumulative electricity usage, and sound an alarm when consumption reaches a user-defined level, usually set a few hundred watts below the actual limit. The result is that Eigg residents have a keen sense of how much power different electrical appliances use, and are careful to minimise energy consumption.

Demand is also managed by warning the entire island when renewable energy generation is lower than demand, and diesel generators are operating to back it up – a so-called ‘red light day’, as opposed to ‘green light days’ when there is sufficient renewable energy. Residents then take steps to temporarily reduce electricity demand further still, or postpone demand until renewable energy generation has increased.

Energy use on the island has also been reduced through improved wall and loft insulation in homes, new boilers, solar water heating, car­sharing and various small, energy-saving measures in households. New energy supplies are being developed, including sustainably harvested forests to supply wood for heating.

Eigg Heritage Trust has installed insulation in all of its own properties at no cost to the tenants, while private properties have paid for their own insulation to be installed. The same applies for installations of solar water heating, although not all Trust properties have received this as yet. The Trust also operates a Green Grants scheme, where residents can claim 50 percent of the cost of equipment to reduce carbon emissions, up to a limit of £300. Purchases included bikes, solar water heating, secondary glazing, thicker curtains, and greenhouses to grow food locally, rather than importing it.

Environmental benefits
Prior to the installation of the new electricity grid and renewable energy generation, most households on Eigg used-diesel generators to supply electricity, resulting in significant carbon emissions. Homes were also poorly insulated and had old, inefficient oil-burning boilers, or used coal for heating.

The work by the Eigg Heritage Trust to reduce energy use has resulted in significant reductions in carbon emissions from the island’s households and businesses. The average annual electricity use per household is just 2,160 kilowatt hours (kWh), compared to a UK average in 2008 of 4,198 kWh. Domestic carbon emissions have fallen by 47 percent, from 8.4 to 4.45 tonnes per year. This compares to average UK household emissions of 5.5 to 6 tonnes per year. The emissions should fall even further over the next few years as the supply of wood for heating increases.

Social benefits
The completion of Eigg’s electricity grid has made a significant difference to the island’s residents, freeing them from dependence on diesel generators and providing them with a stable and affordable power supply. A reliable electricity supply has brought improvements in other areas, for example, better treatment of drinking water in some houses, and the elimination of the constant noise of diesel generators. Improved home insulation and heating has also yielded benefits, making it more affordable to keep homes at a comfortable temperature. One of the incentives for capping electricity use, rather than charging different amounts according to usage, was to make access to energy equitable. Every household has the same five kW cap, irrespective of income, so distributing the available resources equally across the island’s population.

Economic and employment benefits
Eigg’s electricity grid supports four part-time maintenance jobs on the island, and residents have also been employed for building work to improve Trust-owned houses and other buildings. Likewise, the start of organised harvesting of wood for heating has created several forestry jobs for residents. A part-time ‘green project manager’ post has also been created. A wider economic impact has come from having a reliable and affordable electricity supply, which has enabled several new businesses to start up, including restaurants, shops, guest houses and self-catering accommodation. As Eigg has become known for cutting carbon emissions and protecting the environment, an increasing number of visitors have come to the island to learn about its work, bringing a further economic benefit to the residents.

Questions 1-7
Answer the questions below. Choose NO MORE THAN TWO WORDS AND/OR A NUMBER from the passage for each answer.

1. Approximately how many people live on Eigg?
2. What proportion of a UK household’s electricity consumption does an Eigg household consume?
3. Apart from wind and sun, where does most of Eigg’s electricity come from?
4. What device measures the amount of electricity Eigg’s households are using?
5. When renewable energy supplies are insufficient, what backs them up?
6. What has EHT provided free of charge in all the houses it owns?
7. Which gardening aid did some Eigg inhabitants claim grants for?

Questions 8-13
Do the following statements agree with the information given in Reading Passage 1? Write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

8. Electricity was available for the first time on Eigg when a new grid was switched on.
9. Eigg’s carbon emissions are now much lower than before.
10. Wood will soon be the main source of heating on Eigg.
11. Eigg is quieter as a result of having a new electricity supply.
12. Well-off households pay higher prices for the use of extra electricity.
13. The new electricity grid has created additional employment opportunities on Eigg.

Change in business organisations

A The forces that operate to bring about change in organisations can be thought of as winds which are many and varied – from small summer breezes that merely disturb a few papers, to mighty howling gales which cause devastation to structures and operations, causing consequent reorientation of purpose and rebuilding. Sometimes, however, the winds die down to give periods of relative calm, periods of relative organisational stability. Such a period was the agricultural age, which Goodman (1995) maintains prevailed in Europe and western societies as a whole until the early 1700s. During this period, wealth was created in the context of an agriculturally based society influenced mainly by local markets (both customer and labour) and factors outside people’s control, such as the weather. During this time, people could fairly well predict the cycle of activities required to maintain life, even if that life might be at little more than subsistence level.

B To maintain the meteorological metaphor, stronger winds of change blew to bring in the Industrial Revolution and the industrial age. Again, according to Goodman, this lasted for a long time, until around 1945. It was characterised by a series of inventions and innovations that reduced the number of people needed to work the land and, in turn, provided the means of production of hitherto rarely obtainable goods; for organisations, supplying these in ever increasing numbers became the aim. To a large extent, demand and supply were predictable, enabling . companies to structure their organisations along what Burns and Stalker (1966) described as mechanistic lines, that is as systems of strict hierarchical structures and firm means of control.

C This situation prevailed for some time, with demand still coming mainly from the domestic market and organisations striving to fill the ‘supply gap’. Thus the most disturbing environmental influence on organisations of this time was the demand for products, which outstripped supply. The saying attributed to Henry Ford that ‘You can have any colour of car so long as it is black’, gives a flavour of the supply-led state of the market. Apart from any technical difficulties of producing different colours of car, Ford did not have to worry about customers’ colour preferences: he could sell all that he made. Organisations of this period can be regarded as ‘task-oriented’, with effort being put into increasing production through more effective and efficient production processes.

D As time passed, this favourable period for organisations began to decline. In the neo-industrial age, people became more discriminating in the goods and services they wished to buy and, as technological advancements brought about increased productivity, supply overtook demand. Companies began, increasingly, to look abroad for additional markets.

E At the same time, organisations faced more intensive competition from abroad for their own products and services. In the West, this development was accompanied by a shift in focus from manufacturing to service, whether this merely added value to manufactured products, or whether it was service in-its own right. In the neo-industrial age of western countries, the emphasis moved towards adding value to goods and services – what Goodman calls the value-oriented time, as contrasted with the task- oriented and products/services-oriented times of the past.

F Today, in the post-industrial age, most people agree that organisational life is becoming ever more uncertain, as the pace of change quickens and the future becomes less predictable. Writing in 1999, Nadler and Tushman, two US academics, said: ‘Poised on the eve of the next century, we are witnessing a profound transformation in the very nature of our business organisations. Historic forces have converged to fundamentally reshape the scope, strategies, and structures of large enterprises.’ At a less general level of analysis, Graeme Leach, Chief Economist at the British Institute of Directors, claimed in the Guardian newspaper (2000) that: ‘By 2020, the nine-to-five rat race will be extinct and present levels of self-employment, commuting and technology use, as well as age and sex gaps, will have changed beyond recognition.’ According to the article, Leach anticipates that: ‘In 20 years time, 20-25 percent of the workforce will be temporary workers and many more will be flexible, … 25 percent of people will no longer work in a traditional office and … 50 percent will work from home in some form.’ Continuing to use the ‘winds of change’ metaphor, the expectation’s of damaging gale-force winds bringing the need for rebuilding that takes the opportunity to incorporate new ideas and ways of doing things.

G Whether all this will happen is arguable. Forecasting the future is always fraught with difficulties. For instance, Mannermann (1998) sees future studies as part art and part science and notes: ‘The future is full of surprises, uncertainty, trends and trend breaks, irrationality and rationality, and it is changing and escaping from our hands as time goes by. It is also the result of actions made by innumerable more or less powerful forces.’ What seems certain is that the organisational world is changing at a fast rate – even if the direction of change is not always predictable. Consequently, it is crucial that organisational managers and decision makers are aware of, and able to analyse the factors which trigger organisational change.

Questions 14-18
Reading Passage 2 has SEVEN paragraphs, A-G. Which paragraph contains the following information?

14. some specific predictions about businesses and working practices
15. reference to the way company employees were usually managed
16. a warning for business leaders
17. the description of an era notable for the relative absence of change
18. a reason why customer satisfaction was not a high priority

Questions 19-23
Look at the following characteristics (Questions 19-23) and the list of periods below. Match each characteristic with the correct period, A, B or C. NB You may use any letter more than once.

19. a surplus of goods.
20. an emphasis on production quantity.
21. the proximity of consumers to workplaces.
22. a focus on the quality of goods.
23. new products and new ways of working.

List of periods
A The agricultural age.
B The industrial age.
C The neo-industrial age.

Questions 24-26
Complete the summary below. Choose ONE WORD ONLY from the passage for each answer.

Businesses in the 21st century

It is generally agreed that changes are taking place more quickly now, and that organisations are being transformed. One leading economist suggested that by 2020, up to a quarter of employees would be (24)………………….and half of all employees would be based in the (25)……………………….Although predictions can be wrong, the speed of change is not in doubt, and business leaders need to understand the (26)……………….that will be influential.

The creation of lasting memories

Many studies of the brain processes underlying the creation of memory consolidation (lasting memories) have involved giving various human and animal subjects treatment, while training them to perform a task. These have contributed greatly to our understanding.

In pioneering studies using goldfish, Bernard Agranoff found that protein synthesis inhibitors injected after training caused the goldfish to forget what they had learned. In other experiments, he administered protein synthesis inhibitors immediately before the fish were trained. The remarkable finding was that the fish learned the task completely normally, but forgot it within a few hours – that is, the protein synthesis inhibitors blocked memory consolidation, but did not influence short-term memory.

There is now extensive evidence that short-term memory is spared by many kinds of treatments, including electro-convulsive therapy (ECT), that block memory consolidation. On the other hand, and equally importantly, neuroscientist Ivan Izquierdo found that many drug treatments can block short-term memory without blocking memory consolidation. Contrary to the hypothesis put forward by Canadian psychologist Donald Hebb, in 1949, long-term memory does not require short-term memory, and vice versa.

Such findings suggest that our experiences create parallel, and possibly independent stages of memory, each with a different life span. All of this evidence from clinical and experimental studies strongly indicates that the brain handles recent and remote memory in different ways; but why does it do that?

We obviously need to have memory that is created rapidly: reacting to an ever and rapidly changing environment requires that. For example, most current building codes require that the heights of all steps in a staircase be equal. After taking a couple of steps, up or down, we implicitly remember the heights of the steps and assume that the others will be the same. If they are not the same, we are very likely to trip and fall. Lack of this kind of rapidly created implicit memory would be bad for us and for insurance companies, but perhaps good for lawyers. It would be of little value to us if we remembered the heights of the steps only after a delay of many hours, when the memory becomes consolidated.

The hypothesis that lasting memory consolidates slowly over time is supported primarily by clinical and experimental evidence that the formation of long-term memory is influenced by treatments and disorders affecting brain functioning. There are also other kinds of evidence indicating more directly that the memories consolidate over time after learning. Avi Kami and Dov Sagi reported that the performance of human subjects trained in a visual skill did not improve until eight hours after the training was completed, and that improvement was even greater the following day. Furthermore, the skill was retained for several years.

Studies using human brain imaging to study changes in neural activity induced by learning have also reported that the changes continue to develop for hours after learning. In an innovative study using functional imaging of the brain, Reza Shadmehr and Henry Holcomb examined brain activity in several brain regions shortly after human subjects were trained in a motor learning task requiring arm and hand movements. They found that while the performance of the subjects remained stable for several hours after completion of the training, their brain activity did not; different regions of the brain were predominantly active at different times over a period of several hours after the training. The activity shifted from the prefrontal cortex to two areas known to be involved in controlling movements, the motor cortex and cerebellar cortex. Consolidation of the motor skill appeared to involve activation of different neural systems that increased the stability of the brain processes underlying the skill.

There is also evidence that learning-induced changes in the activity of neurons in the cerebral cortex continue to increase for many days after the training. In an extensive series of studies using rats with electrodes implanted in the auditory cortex, Norman Weinberger reported that, after a tone of specific frequency was paired a few times with footshock, neurons in the rats’ auditory cortex responded more to that specific tone and less to other tones of other frequencies. Even more interestingly, the selectivity of the neurons’ response to the specific tone used in training continued to increase for several days after the training was terminated.

It is not intuitively obvious why our lasting memories consolidate slowly. Certainly, one can wonder why we have a form of memory that we have to rely on for many hours, days or a lifetime, that is so susceptible to disruption shortly after it is initiated. Perhaps the brain system that consolidates long-term memory over time was a late development in vertebrate evolution. Moreover, maybe we consolidate memories slowly because our mammalian brains are large and enormously complex. We can readily reject these ideas. All species of animals studied to date have both short and long-term memory; and all are susceptible to retrograde amnesia. Like humans, birds, bees, and molluscs, as well as fish and rats, make long-term memory slowly. Consolidation of memory clearly emerged early in evolution, and was conserved.

Although there seems to be no compelling reason to conclude that a biological system such as a brain could not quickly make a lasting memory, the fact is that animal brains do not. Thus, memory consolidation must serve some very important adaptive function or functions. There is considerable evidence suggesting that the slow consolidation is adaptive because it enables neurobiological processes occurring shortly after learning to influence the strength of memory for experiences. The extensive evidence that memory can be enhanced, as well as impaired, by treatments administered shortly after training, provides intriguing support for this hypothesis.

Questions 27-31
Choose the correct letter, A, B, C or D.

27. Experiments by Bernard Agranoff described in Reading Passage 3 involved
A injecting goldfish at different stages of the experiments.
B training goldfish to do different types of task.
C using different types of treatment on goldfish.
D comparing the performance of different goldfish on certain tasks.

28. Most findings from recent studies suggest that
A drug treatments do not normally affect short-term memories.
B long-term memories build upon short-term memories.
C short and long-term memories are formed by separate processes.
D ECT treatment affects both short-and long-term memories.

29. In the fifth paragraph, what does the writer want to show by the example of staircases?
A Prompt memory formation underlies the performance of everyday tasks.
B Routine tasks can be carried out unconsciously.
C Physical accidents can impair the function of memory.
D Complex information such as regulations cannot be retained by the memory.

30. Observations about memory by Kami and Sagi
A cast doubt on existing hypotheses.
B related only to short-term memory.
C were based on tasks involving hearing.
D confirmed other experimental findings.

31. What did the experiment by Shadmehr and Holcomb show?
A Different areas of the brain were activated by different tasks.
B Activity in the brain gradually moved from one area to other areas.
C Subjects continued to get better at a task after training had finished.
D Treatment given to subjects improved their performance on a task.

Questions 32-36
Do the following statements agree with the views of the writer in Reading Passage 3? Write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

32. The training which Kami and Sagi’s subjects were given was repeated over several days.
33. The rats in Weinberger’s studies learned to associate a certain sound with a specific experience.
34. The results of Weinberger’s studies indicated that the strength of the rats’ learned associations increases with time.
35. It is easy to see the evolutionary advantage of the way lasting memories in humans are created.
36. Long-term memories in humans are more stable than in many other species.

Questions 37-40
Complete the summary using the list of words, A-l, below

Long-term memory

Various researchers have examined the way lasting memories are formed. Laboratory experiments usually involve teaching subjects to do something (37)………………and treating them with mild electric shocks or drugs. Other studies monitor behaviour after a learning experience, or use sophisticated equipment to observe brain activity.

The results are generally consistent: they show that lasting memories are the result of a (38)…………….and complex biological process.

The fact that humans share this trait with other species, including animals with (39)………………brains, suggests that it developed (40)……………….in our evolutionary history.

A early
B easy
C large
D late
E lengthy
F new
G recently
H small
I quick

Astronaut ice cream, anyone?

Freeze-drying is like suspended animation for food: you can store a freeze-dried meal for years, and then, when you’re finally ready to eat it. you can completely revitalise it with a little hot water. Even after several years, the original foodstuff will be virtually unchanged. The technique basically involves completely removing the water from some material, such as food while leaving the rest of the material virtually intact. The main reason for doing this is either to preserve the food or to reduce its weight. Removing the water from food keeps it from spoiling, because the microorganisms such as bacteria that cause spoiling cannot survive without it. Similarly, the enzymes which occur naturally in food cannot cause ripening without water, so removing water from food will also stop the ripening process.

Freeze-drying significantly reduces the total weight of the food because most food is largely made up of water; for example, many fruits are more than 80 00% water. Removing this makes the food much lighter and therefore makes transportation less difficult. The military and camping-supply companies freeze-dry foods to make them easier for an individual to carry and NASA has also freeze-dried foods for the cramped quarters on board spacecraft.

The process is also used to preserve other sorts of material, such as pharmaceuticals. Chemists can greatly extend pharmaceutical shelf life by freeze-drying the material and storing it in a container free of oxygen and water. Similarly, research scientists may use freeze-drying to preserve biological samples for long periods of time. Even valuable manuscripts that had been water damaged have been saved by using this process.

Freeze-drying is different from simple drying because it is able to remove almost all the water from materials, whereas simple drying techniques can only remove 90-95%. This means that the damage caused by bacteria and enzymes can virtually be stopped rather than just slowed down. In addition, the composition and structure of the material is not significantly changed, so materials can be revitalised without compromising the quality of the original.

This is possible because in freeze-drying, solid water – ice – is converted directly into water vapour, missing out the liquid phase entirely. This is called ‘sublimation’, the shift from a solid directly into a gas. Just like evaporation, sublimation occurs when a molecule gains enough energy to break free from the molecules around it. Water will sublime from a solid (ice) to a gas (vapour) when the molecules have enough energy to break free but the conditions aren’t right for a liquid to form. These conditions arc determined by heat and atmospheric pressure. When the temperature is above freezing point, so that ice can thaw, but the atmospheric pressure is too low for a liquid to form (below 0.06 atmospheres (ATM)) then it becomes a gas.

This is the principle on which a freeze-drying machine is based. The material to be preserved is placed in a freeze-drying chamber which is connected to a freezing coil and refrigerator compressor. When the chamber is sealed the compressor lowers the temperature inside it. I he material is frozen solid, which separates the water from everything around it on a molecular level, even though the water is still present. Next, a vacuum pump forces air out of the chamber, lowering the atmospheric pressure below to 0.06 ATM. The heating units apply a small amount of heat to the shelves in the chamber, causing the ice to change phase. Since the pressure in the chamber is so low, the ice turns directly into water vapour, which leaves the freeze-drying chamber, and flows past the freezing coil. The water vapour condenses onto the freezing coil in the form of solid ice, in the same way that water condenses as frost on a cold day.

The process continues for many hours (even days) while the material gradually dries out. This time is necessary to avoid overheating, which might affect the structure of the material. Once it has dried sufficiently, it is sealed in a moisture-free package. As long as the package is secure, the material can sit on a shelf for years and years without degrading, until it is restored to its original form with a little hot water. If everything works correctly, the material will go through the entire process almost completely unscathed.

In fact, freeze-drying, as a general concept, is not new but has been around for centuries. The ancient Incas of Peru used mountain peaks along the Andes as natural food preservers. The extremely cold temperatures and low pressure at those high altitudes prevented food from spoiling in the same basic way as a modern freeze-drying machine and a freezer.

Questions 1-5
Complete the notes below. Choose NO MORE THAN THREE WORDS from the passage for each answer.

Uses of freeze-drying:
• food preservation
• easy (1)………………….. of food items
• long-term storage of (2)………………..and biological samples
• preservation of precious (3)………………

Freeze-drying
• is based on process of (4)…………………… is more efficient than (5)………………….

Questions 6-9
Label the diagram below. Choose NO MORE THAN TWO WORDS from the passage for each answer.

Questions 10-13
Complete the summary below. Choose NO MORE THAN THREE WORDS AND/OR A NUMBER from the passage for each answer.

Freeze-drying prevents food from going bad by stopping the activity of microorganisms or (10)………………….Its advantages are that the food tastes and feels the same as the original because both the (11)………………….and structure are preserved. The process is carried out slowly in order to ensure that (12)…………………does not take place. The people of one ancient mountain civilisation were able to use this method of food preservation because the conditions needed were present at (13)………………….

THE WILD SIDE OF TOWN

The past half century has seen an interesting reversal in the fortunes of much of Britain’s wildlife. Whilst the rural countryside has become poorer and poorer, wildlife habitat in towns has burgeoned. Now, if you want to hear a deafening dawn chorus of birds or familiarise yourself with foxes, you can head for the urban forest. Whilst species that depend on wide open spaces such as the hare, the eagle and the red deer may still be restricted to remote rural landscapes, many of our wild plants and animals find the urban ecosystem ideal. This really should be no surprise, since it is the fragmentation and agrochemical pollution in the farming lowlands that has led to the catastrophic decline of so many species.

By contrast, most urban open spaces have escaped the worst of the pesticide revolution, and they are an intimate mosaic of interconnected habitats. Over the years, the cutting down of hedgerows on farmland has contributed to habitat isolation and species loss. In towns, the tangle of canals, railway embankments, road verges and boundary hedges lace the landscape together, providing first-class ecological corridors for species such as hedgehogs, kingfishers and dragonflies.

Urban parks and formal recreation grounds are valuable for some species, and many of them are increasingly managed with wildlife in mind. But in many places their significance is eclipsed by the huge legacy of post-industrial land demolished factories, waste tips, quarries, redundant railway yards and other so-called ‘brownfield’ sites. In Merseyside, South Yorkshire and the West Midlands, much of this has been spectacularly colonised with birch and willow woodland, herb-rich grassland and shallow wetlands. As a consequence, there are song birds and predators in abundance over these once-industrial landscapes.

There are fifteen million domestic gardens in the UK. and whilst some are still managed as lifeless chemical war zones, most benefit the local wildlife, either through benign neglect or positive encouragement. Those that do best tend to be woodland species, and the garden lawns and flower borders, climber-covered fences, shrubberies and fruit trees are a plausible alternative. Indeed, in some respects gardens are rather better than the real thing, especially with exotic flowers extending the nectar season. Birdfeeders can also supplement the natural seed supply, and only the millions of domestic cats may spoil the scene.

As Britain’s gardeners have embraced the idea of ‘gardening with nature’, wildlife’s response has been spectacular. Between 1990 and the year 2000. the number of different bird species seen at artificial feeders in gardens increased from 17 to an amazing 81. The BUGS project (Biodiversity in Urban Gardens in Sheffield) calculates that there are 25.000 garden ponds and 100.000 nest boxes in that one city alone.

We are at last acknowledging that the wildlife habitat in towns provides a valuable life support system. The canopy of the urban forest is filtering air pollution, and intercepting rainstorms, allowing the water to drip more gradually to the ground. Sustainable urban drainage relies on ponds and wetlands to contain storm water runoff, thus reducing the risk of flooding, whilst reed beds and other wetland wildlife communities also help to clean up the water. We now have scientific proof that contact with wildlife close to home can help to reduce stress and anger. Hospital patients with a view of natural green space make a more rapid recovery and suffer less pain.

Traditionally, nature conservation in the UK has been seen as marginal and largely rural. Now we are beginning to place it at the heart of urban environmental and economic policy. There are now dozens of schemes to create new habitats and restore old ones in and around our big cities. Biodiversity is big in parts of London. thanks to schemes such as the London Wetland Centre in the south west of the city. This is a unique scheme masterminded by the Wildfowl and Wetlands Trust to create a wildlife reserve out of a redundant Victorian reservoir. Within five years of its creation the Centre has been hailed as one of the top sites for nature in England and made a Site of Special Scientific Interest. It consists of a 105-acre wetland site, which is made up of different wetland habitats of shallow, open water and grazing marsh. The site attracts more than 104 species of bird, including nationally important rarities like the bittern. We need to remember that if we work with wildlife, then wildlife will work for us and this is the very essence of sustainable development.

Questions 14-19
Do the following statements agree with the information given in Reading Passage 2? In boxes 14-19 on your answer sheet write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

14. There is now more wildlife in UK cities than in the countryside.
15. Rural wildlife has been reduced by the use of pesticides on farms.
16. In the past, hedges on farms used to link up different habitats.
17. New urban environments are planned to provide ecological corridors for wildlife.
18. Public parks and gardens are being expanded to encourage wildlife.
19. Old industrial wastelands have damaged wildlife habitats in urban areas.

Questions 20-23
Answer the questions below, using NO MORE THAN THREE WORDS AND/OR A NUMBER from the passage for each answer.

20. Which type of wildlife benefits most from urban gardens?
21. What type of garden plants can benefit birds and insects?
22. What represents a threat to wildlife in urban gardens?
23. At the last count, how many species of bird were spotted in urban gardens?

Question 24-26
Choose THREE letters A-G.

In which THREE ways can wildlife habitats benefit people living in urban areas?

A they can make the cities greener
B they can improve the climate
C they can promote human well being
D they can extend the flowering season
E they can absorb excess water
F they can attract wildlife
G they can help clean the urban atmosphere

Question 27
Choose the correct answer, A, B, C or D.

27. The writer believes that sustainable development is dependent on
A urban economic policy.
B large restoration schemes.
C active nature conservation.
D government projects.

Running on empty

A For almost a century, scientists have presumed, not unreasonably, that fatigue – or exhaustion in athletes originates in the muscles. Precise explanations have varied but all have been based on the ‘limitations theory’. In other words, muscles tire because they hit a physical limit: they either run out of fuel or oxygen or they drown in toxic by-products.

B In the past few years, however, Timothy Noakes and Alan St Clair Gibson from the University of Cape Town, South Africa, have examined this standard theory. The deeper they dig, the more convinced they have become that physical fatigue simply isn’t the same as a car running out of petrol. Fatigue, they argue, is caused not by distress signals springing from overtaxed muscles, but is an emotional response which begins in the brain. The essence of their new theory is that the brain, using a mix of physiological, subconscious and conscious cues, paces the muscles to keep them well back from the brink of exhaustion. When the brain decides its time to quit, it creates the distressing sensations we interpret as unbearable muscle fatigue. This ‘central governor* theory remains controversial, but it does explain many puzzling aspects of athletic performance.

C A recent discovery that Noakes calls the ‘lactic acid paradox’ made him start researching this area seriously. Lactic acid is a by-product of exercise, and its accumulation is often cited as a cause of fatigue. But when research subjects exercise in conditions simulating high altitude, they become fatigued even though lactic acid levels remain low. Nor has the oxygen content of their blood fallen too low for them to keep going. Obviously, Noakes deduced, something else was making them tire before they hit either of these physiological limits.

D Probing further, Noakes conducted an experiment with seven cyclists who had sensors taped to their legs to measure the nerve impulses travelling through their muscles. It has long been known that during exercise, the body never uses 100% of the available muscle fibres in a single contraction. The amount used varies, but in endurance tasks such as this cycling test the body calls on about 30%.

E Noakes reasoned that if the limitations theory was correct and fatigue was due to muscle fibres hitting some limit, the number of fibres used for each pedal stroke should increase as the fibres tired and the cyclist’s body attempted to compensate by recruiting an ever-larger proportion of the total. But his team found exactly the opposite. As fatigue set in, the electrical activity in the cyclists’ legs declined – even during sprinting, when they were striving to cycle as fast as they could.

F To Noakes, this was strong evidence that the old theory was wrong. ‘The cyclists may have felt completely exhausted,’ he says, ‘but their bodies actually had considerable reserves that they could theoretically tap by using a greater proportion of the resting fibres.’ This, he believes, is proof that the brain is regulating the pace of the workout to hold the cyclists well back from the point of catastrophic exhaustion.

G More evidence comes from the fact that fatigued muscles don’t actually run out of anything critical. Levels of glycogen, which is the muscles’ primary fuel, and ATP. the chemical they use for temporary energy storage, decline with exercise but never bottom out. Even at the end of a marathon, ATP levels are 80-90% of the resting norm, and glycogen levels never get to zero.

H Further support for the central regulator comes from the fact that top athletes usually manage to go their fastest at the end of a race, even though, theoretically, that’s when their muscles should be closest to exhaustion. But Noakes believes the end spurt makes no sense if fatigue is caused by muscles poisoning themselves with lactic acid as this would cause racers to slow down rather than enable them to sprint for the finish line. In the new theory, the explanation is obvious. Knowing the end is near, the brain slightly relaxes its vigil, allowing the athlete to tap some of the body’s carefully hoarded reserves.

I But the central governor theory does not mean that what’s happening in the muscles is irrelevant. The governor constantly monitors physiological signals from the muscles, along with other information, to set the level of fatigue. A large number of signals are probably involved but, unlike the limitations theory, the central governor theory suggests that these physiological factors are not the direct determinants of fatigue, but simply information to take into account.

J Conscious factors can also intervene. Noakes believes that the central regulator evaluates the planned workout, and sets a pacing strategy accordingly. Experienced runners know that if they set out on a 10-kilometre run. the first kilometre feels easier than the first kilometre of a 5-kilometre run, even though there should be no difference. That, Noakes says, is because the central governor knows you have farther to go in the longer run and has programmed itself to dole out fatigue symptoms accordingly.

K St Clair Gibson believes there is a good reason why our bodies arc designed to keep something back. That way, there’s always something left in the tank for an emergency. In ancient times, and still today, life would be too dangerous if our bodies allowed us to become so tired that we couldn’t move quickly when faced with an unexpected need.

Questions 28-33
Reading Passage 3 has eleven paragraphs A-K. Choose the correct heading for Paragraphs A-F from the list of headings below.

List of headings
i Avoiding tiredness in athletes
ii Puzzling evidence raises a question
iii Traditional explanations
iv Interpreting the findings
v Developing muscle fibres
vi A new hypothesis
vii Description of a new test
viii Surprising results in an endurance test

28. Paragraph A
29. Paragraph B
30. Paragraph C
31. Paragraph D
32. Paragraph E
33. Paragraph F

Questions 34-40
Classify the following ideas as relating to

A the Limitations Theory
B the Central Governor Theory
C both the Limitations Theory and the Central Governor Theory

34. Lactic acid is produced in muscles during exercise.
35. Athletes can keep going until they use up all their available resources.
36. Mental processes control the symptoms of tiredness.
37. The physiological signals from an athlete’s muscles are linked to fatigue.
38. The brain plans and regulates muscle performance in advance of a run.
39. Athletes’ performance during a race may be affected by lactic acid build-up.
40. Humans are genetically programmed to keep some energy reserves.

Sustainable architecture – lessons from the ant

Africa owes its termite mounds a lot. Trees and shrubs take root in them. Prospectors mine them, looking for specks of gold carried up by termites from hundreds of metres below. And of course, they are a special treat to aardvarks and other insectivores. Now, Africa is paying an offbeat tribute to these towers of mud. The extraordinary Eastgate Building in Harare, Zimbabwe’s capital city, is said to be the only one in the world to use the same cooling and heating principles as the termite mound.

Termites in Zimbabwe build gigantic mounds inside which they farm a fungus that is their primary food source. This must be kept at exactly 30.5°C, while the temperatures on the African veld outside can range from 1.5°C at night only just above freezing to a baking hot 40°C during the day. The termites achieve this remarkable feat by building a system of vents in the mound. Those at the base lead down into chambers cooled by wet mud carried up from water tables far below, and others lead up through a flue to the peak of the mound. By constantly opening and closing these heating and cooling vents over the course of the day the termites succeed in keeping the temperature constant in spite of the wide fluctuations outside.

Architect Mick Pearce used precisely the same strategy when designing the Eastgate Building, which has no air conditioning and virtually no heating. The building the country’s largest commercial and shopping complex uses less than 10% of the energy of a conventional building ns size. These efficiencies translated directly to the bottom line: the Eastgate’s owners saved $3.5 million on a $36 million building because an air- conditioning plant didn’t have to be imported. These savings were also passed on to tenants: rents are 20% lower than in a new building next door. The complex is actually two buildings linked by bridges across a shady, glass-roofed atrium open to the breezes. Fans suck fresh air in from the atrium, blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents. As it rises and warms, it is drawn out via ceiling vents and finally exits through forty- eight brick chimneys. To keep the harsh, highveld sun from heating the interior, no more than 25% of the outside is glass, and all the windows are screened by cement arches that just out more than a metre.

During summer’s cool nights, big fans flush air through the building seven times an hour to chill the hollow floors. By day, smaller fans blow two changes of air an hour through the building, to circulate the air which has been in contact with the cool floors. For winter days, there are small heaters in the vents. This is all possible only because Harare is 1600 feet above sea level, has cloudless skies, little humidity and rapid temperature swings days as warm as 31°C commonly drop to 14°C at night. ‘You couldn’t do this in New York, with its fantastically hot summers and fantastically cold winters,’ Pearce said. But then his eyes lit up at the challenge.’ Perhaps you could store the summer’s heat in water somehow.

The engineering firm of Ove Amp & Partners, which worked with him on the design, monitors daily temperatures outside, under the floors and at knee, desk and ceiling level. Ove Arup’s graphs show that the temperature of the building has generally stayed between 23″C and 25°C. with the exception of the annual hot spell just before the summer rains in October, and three days in November, when a janitor accidentally switched off the fans at night. The atrium, which funnels the winds through, can be much cooler. And the air is fresh far more so than in air-conditioned buildings, where up to 30% of the air is recycled.

Pearce, disdaining smooth glass skins as ‘igloos in the Sahara’, calls his building, with its exposed girders and pipes, ‘spiky’. The design of the entrances is based on the porcupine-quill headdresses of the local Shona tribe. Elevators are designed to look like the mineshaft cages used in Zimbabwe’s diamond mines. The shape of the fan covers, and the stone used in their construction, are echoes of Great Zimbabwe, the ruins that give the country its name. Standing on a roof catwalk, peering down inside at people as small as termites below. Pearce said he hoped plants would grow wild in the atrium and pigeons and bats would move into it. like that termite fungus, further extending the whole ‘organic machine’ metaphor. The architecture, he says, is a regionalised style that responds to the biosphere, to the ancient traditional stone architecture of Zimbabwe’s past, and to local human resources.

Questions 1-5
Choose the correct answer, A, B, C or D.

1. Why do termite mounds have a system of vents?
A to allow the termites to escape from predators
B to enable the termites to produce food
C to allow the termites to work efficiently
D to enable the termites to survive at night

2. Why was Eastgate cheaper to build than a conventional building?
A Very few materials were imported.
B Its energy consumption was so low.
C Its tenants contributed to the costs.
D No air conditioners were needed.

3. Why would a building like Eastgate not work efficiently in New York?
A Temperature change occurs seasonally rather than daily.
B Pollution affects the storage of heat in the atmosphere.
C Summer and winter temperatures are too extreme.
D Levels of humidity affect cloud coverage.

4. What does Ove Arup’s data suggest about Eastgate’s temperature control system?
A It allows a relatively wide range of temperatures.
B The only problems are due to human error.
C It functions well for most of the year.
D The temperature in the atrium may fall too low

5. Pearce believes that his building would be improved by
A becoming more of a habitat for wildlife.
B even closer links with the history of Zimbabwe.
C giving people more space to interact with nature.
D better protection from harmful organisms.

Questions 6-10
Complete the sentences below with words taken from Reading Passage 1. Use NO MORE THAN THREE WORDS for each answer.

Warm air leaves the offices through (6)……………………….

The warm air leaves the building through (7)……………….

Heat from the sun is prevented from reaching the windows by (8)…………………..

When the outside temperature drops (9)……………….bring air in from outside.

On cold days (10)……………………raise the temperature in the offices.

Questions 11-13
Answer the question below, using NO MORE THAN THREE WORDS from the passage for each answer.

Which three parts of the Eastgate Building reflect important features of Zimbabwe’s history and culture?

A entrances
B quill
C cages
D elevators
E fan covers
F stone

Inside the mind of the consumer

A MARKETING people are no longer prepared to take your word for it that you favour one product over another. They want to scan your brain to see which one you really prefer. Using the tools of neuroscientists, such as electroencephalogram (EEG) mapping and functional magnetic-resonance imaging (fMRI), they are trying to learn more about the mental processes behind purchasing decisions. The resulting fusion of neuroscience and marketing is inevitably, being called ‘neuromarketing’.

B The first person to apply brain-imaging technology in this way was Gerry Zaltman of Harvard University, in the late 1990s. The idea remained in obscurity until 2001, when BrightHouse, a marketing consultancy based in Atlanta, Georgia, set up a dedicated neuromarketing arm, BrightHouse Neurostrategies Group. (BrightHouse lists Coca-Cola, Delta Airlines and Home Depot among its clients.) But the company’s name may itself simply be an example of clever marketing. BrightHouse does not scan people while showing them specific products or campaign ideas, but bases its work on the results of more general fMRI-based research into consumer preferences and decision-making carried out at Emory University in Atlanta.

C Can brain scanning really be applied to marketing? The basic principle is not that different from focus groups and other traditional forms of market research. A volunteer lies in an fMRI machine and is shown images or video clips. In place of an interview or questionnaire, the subject’s response is evaluated by monitoring brain activity. fMRI provides real-time images of brain activity, in which different areas “light up” depending on the level of blood flow. This provides clues to the subject’s subconscious thought patterns. Neuroscientists know, for example, that the sense of self is associated with an area of the brain known as the medial prefrontal cortex. A flow of blood to that area while the subject is looking at a particular logo suggests that he or she identifies with that brand.

D At first, it seemed that only companies in Europe were prepared to admit that they used neuromarketing. Two carmakers, DaimlerChrysler in Germany and Ford’s European arm, ran pilot studies in 2003. But more recently, American companies have become more open about their use of neuromarketing. Lieberman Research Worldwide, a marketing firm based in Los Angeles, is collaborating with the California Institute of Technology (Caltech) to enable movie studios to market-test film trailers. More controversially, the New York Times recently reported that a political consultancy, FKF Research, has been studying the effectiveness of campaign commercials using neuromarketing techniques.

E Whether all this is any more than a modern-day version of phrenology, the Victorian obsession with linking lumps and bumps in the skull to personality traits, is unclear. There have been no large-scale studies, so scans of a handful of subjects may not be a reliable guide to consumer behaviour in general. Of course, focus groups and surveys are flawed too: strong personalities can steer the outcomes of focus groups, and people do not always tell opinion pollsters the truth. And even honest people cannot always explain their preferences.

F That is perhaps where neuromarketing has the most potential. When asked about cola drinks, most people claim to have a favourite brand, but cannot say why they prefer that brand’s taste. An unpublished study of attitudes towards two well- known cola drinks. Brand A and Brand 13. carried out last year in a college of medicine in the US found that most subjects preferred Brand B in a blind tasting fMRI scanning showed that drinking Brand B lit up a region called the ventral putamen, which is one of the brain s ‘reward centres’, far more brightly than Brand A. But when told which drink was which, most subjects said they preferred Brand A, which suggests that its stronger brand outweighs the more pleasant taste of the other drink.

G “People form many unconscious attitudes that are obviously beyond traditional methods that utilise introspection,” says Steven Quartz, a neuroscientist at Caltech who is collaborating with Lieberman Research. With over $100 billion spent each year on marketing in America alone, any firm that can more accurately analyse how customers respond to products, brands and advertising could make a fortune.

H Consumer advocates are wary. Gary Ruskin of Commercial Alert, a lobby group, thinks existing marketing techniques are powerful enough. “Already, marketing is deeply implicated in many serious pathologies,” he says. “That is especially true of children, who are suffering from an epidemic of marketing- related diseases, including obesity and type-2 diabetes. Neuromarketing is a tool to amplify these trends.”

I Dr Quartz counters that neuromarketing techniques could equally be used for benign purposes. “There are ways to utilise these technologies to create more responsible advertising,” he says. Brain-scanning could, for example, be used to determine when people are capable of making free choices, to ensure that advertising falls within those bounds.

J Another worry is that brain-scanning is an invasion of privacy and that information on the preferences of specific individuals will be misused. But neuromarketing studies rely on small numbers of volunteer subjects, so that seems implausible. Critics also object to the use of medical equipment for frivolous rather than medical purposes. But as Tim Ambler, a neuromarketing researcher at the London Business School, says: ‘A tool is a tool, and if the owner of the tool gets a decent rent for hiring it out, then that subsidises the cost of the equipment, and everybody wins.’ Perhaps more brain-scanning will some day explain why some people like the idea of neuromarketing, but others do not.

Questions 14-19
Reading Passage 2 has ten paragraphs A-J. Choose the correct heading for Paragraphs B-G from the list of headings below.

14. Paragraph B
15. Paragraph C
16. Paragraph D
17. Paragraph E
18. Paragraph F
19. Paragraph G

List of Headings
i A description of the procedure
ii An international research project
iii An experiment to investigate consumer responses
iv Marketing an alternative name
v A misleading name
vi A potentially profitable line of research
vii Medical dangers of the technique
viii Drawbacks to marketing tools
ix Broadening applications
x What is neuromarketing?

Questions 20-22
Look at the following people (Questions 20-22) and the list of opinions below. Match each person with the opinion credited to him.

20. Steven Quartz
21. Gary Ruskin
22. Tim Ambler

List of opinions
A Neuromarketing could be used lo contribute towards the cost of medical technology.
B Neuromarketing could use introspection as a tool in marketing research.
C Neuromarketing could be a means of treating medical problems.
D Neuromarketing could make an existing problem worse.
E Neuromarketing could lead to the misuse of medical equipment.
F Neuromarketing could be used to prevent the exploitation of consumers.

Questions 23-26
Complete the summary below using words from the passage. Choose ONE WORD ONLY from the passage for each answer.

Neuromarketing can provide valuable information on attitudes to particular (23)…………………It may be more reliable than surveys, where people can be (24)……………………..or focus groups, where they may be influenced by others. It also allows researchers to identify the subject’s (25)…………………thought patterns. However, some people are concerned that it could lead to problems such as an increase in disease among (26)………………..

The accidental rainforest

When PeterOsbeck. a Swedish priest, stopped off at the mid-Atlantic island of Ascension in 1752 on his way home from China, he wrote of ‘a heap of ruinous rocks’ with a bare, white mountain in the middle. All it boasted was a couple of dozen species of plant, most of them ferns and some of them unique to the island.

And so it might have remained. But in 1843 British plant collector Joseph Hooker made a brief call on his return from Antarctica. Surveying the bare earth, he concluded that the island had suffered some natural calamity that had denuded it of vegetation and triggered a decline in rainfall that was turning the place into a desert. The British Navy, which by then maintained a garrison on the island, was keen to improve the place and asked Hooker’s advice. He suggested an ambitious scheme for planting trees and shrubs that would revive rainfall and stimulate a wider ecological recovery. And, perhaps lacking anything else to do, the sailors set to with a will.

In 1845, a naval transport ship from Argentina delivered a batch of seedlings. In the following years, more than 200 species of plant arrived from South Africa, from England came 700 packets of seeds, including those of two species that especially liked the place: bamboo and prickly pear. With sailors planting several thousand trees a year, the bare white mountain was soon cloaked in green and renamed Green Mountain, and by the early twentieth century the mountain’s slopes were covered with a variety of trees and shrubs from all over the world.

Modern ecologists throw up their hands in horror at what they see as Hookers environmental anarchy. The exotic species wrecked the indigenous ecosystem, squeezing out the islands endemic plants. In fact. Hooker knew well enough what might happen. However, he saw greater benefit in improving rainfall and encouraging more prolific vegetation on the island.

But there is a much deeper issue here than the relative benefits of sparse endemic species versus luxuriant imported ones. And as botanist David Wilkinson of Liverpool John Moores University in the UK pointed out after a recent visit to the island, it goes to the heart of some of the most dearly held tenets of ecology. Conservationists’ understandable concern for the fate of Ascension’s handful of unique species has, he says, blinded them to something quite astonishing the fact that the introduced species have been a roaring success.

Today’s Green Mountain, says Wilkinson, is ‘a fully functioning man-made tropical cloud forest’ that has grown from scratch from a ragbag of species collected more or less at random from all over the planet. But how could it have happened? Conventional ecological theory says that complex ecosystems such as cloud forests can emerge only through evolutionary processes in which each organism develops in concert with others to fill particular niches. Plants evolve with their pollinators and seed dispersers, while microbes in the soil evolve to deal with the leaf litter. But that’s not what happened on Green Mountain. And the experience suggests that perhaps natural rainforests are constructed far more by chance than by evolution. Species, say some ecologists, don’t so much evolve to create ecosystems as make the best of what they have. ‘The Green Mountain system is a man-made system that has produced a tropical rainforest without any co-evolution between its constituent species,’ says Wilkinson.

Not everyone agrees. Alan Gray, an ecologist at the University of Edinburgh in the UK. argues that the surviving endemic species on Green Mountain, though small in number, may still form the framework of the new’ ecosystem. The new arrivals may just be an adornment, with little structural importance for the ecosystem. But to Wilkinson this sounds like clutching at straws. And the idea of the instant formation of rainforests sounds increasingly plausible as research reveals that supposedly pristine tropical rainforests from the Amazon to south-east Asia may in places be little more titan the overgrown gardens of past rainforest civilisations.

The most surprising thing of all is that no ecologists have thought to conduct proper research into this human-made rainforest ecosystem. A survey of the island’s flora conducted six years ago by the University of Edinburgh was concerned only with endemic species. They characterised everything else as a threat. And the Ascension authorities are currently turning Green Mountain into a national park where introduced species, at least the invasive ones, are earmarked for culling rather than conservation. Conservationists have understandable concerns, Wilkinson says. At least four endemic species have gone extinct on Ascension since the exotics started arriving. But in their urgency to protect endemics, ecologists are missing out on the study of a great enigma.

‘As you walk through the forest, you see lots of leaves that have had chunks taken out of them by various insects. There are caterpillars and beetles around.’ says Wilkinson. ‘But where did they come from? Are they endemic or alien? If alien, did they come with the plant on which they feed or discover it on arrival?’ Such questions go to the heart of how- rainforests happen. The Green Mountain forest holds many secrets. And the irony is that the most artificial rainforest in the world could tell us more about rainforest ecology than any number of natural forests.

Questions 27-32
Do the following statements agree with the information given in Reading Passage 3? In boxes 27-32 on your answer sheet write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

27. When Peter Osbeck visited Ascension, he found no inhabitants on the island.
28. The natural vegetation on the island contained some species which were found nowhere else.
29. Joseph Hooker assumed that human activity had caused the decline in the island’s plant life.
30. British sailors on the island took part in a major tree planting project.
31. Hooker sent details of his planting scheme to a number of different countries.
32, The bamboo and prickly pear seeds sent from England were unsuitable for Ascension.

Questions 33-37
Complete each sentence with the correct ending A-G from the list below.

33. The reason for modern conservationists’ concern over Hooker’s tree planting programme is that
34. David Wilkinson says the creation of the rainforest in Ascension is important because it shows that
35. Wilkinson says the existence of Ascension’s rainforest challenges the theory that
36. Alan Gray questions Wilkinson’s theory, claiming that
37. Additional support for Wilkinson’s theory comes from findings that

A other rainforests may have originally been planted by man.
B many of the island’s original species were threatened with destruction.
C the species in the original rainforest were more successful than the newer arrivals.
D rainforests can only develop through a process of slow and complex evolution.
E steps should be taken to prevent the destruction of the original ecosystem.
F randomly introduced species can coexist together.
G the introduced species may have less ecological significance than the original ones.

Questions 38-40
Choose the correct letter, A, B, C or D

38. Wilkinson suggests that conservationists’ concern about the island is misguided because
A it is based on economic rather than environmental principles.
B it is not focusing on the most important question.
C it is encouraging the destruction of endemic species.
D it is not supported by the local authorities.

39. According to Wilkinson, studies of insects on the island could demonstrate
A the possibility of new ecological relationships.
B a future threat to the ecosystem of the island.
C the existence of previously unknown species.
D a chance for the survival of rainforest ecology.

40. Overall, what feature of the Ascension rainforest does the writer stress?
A the conflict of natural and artificial systems
B the unusual nature of its ecological structure
C the harm done by interfering with nature
D the speed and success of its development

Green virtues of green sand

A For the past 100 years special high grade white sand dug from the ground at Leighton Buzzard in the UK. has been used to filter tap water to remove bacteria and impurities but this may no longer be necessary. A new factory that turns used wine bottles into green sand could revolutionise the recycling industry and help to filter Britain’s drinking water. Backed by $1.6m from the European Union and the Department for Environment, Food and Rural Affairs (Defra), a company based in Scotland is building the factory, which will turn beverage bottles back into the sand from which they were made in the first place. The green sand has already been successfully tested by water companies and is being used in 50 swimming pools in Scotland to keep the water clean.

B The idea is not only to avoid using up an increasingly scarce natural resource, sand but also to solve a crisis in the recycling industry. Britain uses 5.5m tonnes of glass a year, but recycles only 750,000 tonnes of it. The problem is that half the green bottle glass in Britain is originally from imported wine and beer bottles. Because there is so much of it, and it is used less in domestic production than other types, green glass is worth only $25 a tonne. Clear glass, which is melted down and used for whisky bottles, mainly for export, is worth double that amount.

C Howard Drvden. a scientist and managing director of the company. Drvden Aqua, of Bonnyrigg, near Edinburgh, has spent six years working on the product he calls Active Filtration Media, or AFM. He concedes that he has given what is basically recycled glass a ‘fancy name’ to remove the stigma of what most people would regard as an inferior product. He says he needs bottles that have already contained drinkable liquids to be sure that drinking water filtered through the AFM would not be contaminated. Crushed down beverage glass has fewer impurities than real sand and it performed better in trials. *The fact is that tests show that AFM does the job better than sand, it is easier to clean and reuse and has all sorts of properties that make it ideal for other applications.’ he claimed.

D The factory is designed to produce 100 tonnes of AFM a day, although Mr Dryden regards this as a large-scale pilot project rather than full production. Current estimates of the UK market for this glass for filtering drinking water, sewage, industrial water, swimming pools and fish farming are between 175.000 to 217.000 tonnes a year, which will use up most of the glass available near the factory. So he intends to build five or six factories in cities where there are large quantities of bottles, in order to cut down on transport costs.

E The current factory will be completed this month and is expected to go into full production on January 14th next year. Once it is providing a ‘regular’ product, the government’s drinking water inspectorate will be asked to perform tests and approve it for widespread use by water companies. A Defra spokesman said it was hoped that AFM could meet approval within six months. The only problem that they could foresee was possible contamination if some glass came from sources other than beverage bottles.

F Among those who have tested the glass already is Caroline Fitzpatrick of the civil and environmental engineering department of University College London. ‘We have looked at a number of batches and it appears to do the job.’ she said. ‘Basically, sand is made of glass and Mr Dryden is turning bottles back into sand. It seems a straightforward idea and there is no reason we can think of why it would not work. Since glass from wine bottles and other beverages has no impurities and clearly did not leach any substances into the contents of the bottles, there was no reason to believe there would be a problem,’ Dr Fitzpatrick added.

G Mr Dryden has set up a network of agents round the world to sell AFM. It is already in use in central America to filter water on banana plantations where the fruit has to be washed before being despatched to European markets. It is also in use in sewage works to filter water before it is returned to rivers, something which is becoming legally necessary across the European Union because of tighter regulations on sewage works. So there are a great number of applications involving cleaning up water. Currently, however, AFM costs $670 a tonne, about four times as much as good quality sand. ‘Hut that is because we haven’t got large-scale production. Obviously, when we get going it will cost a lot less, and be competitive with sand in price as well.’ Mr Dryden said. ‘I believe it performs better and lasts longer than sand, so it is going to be better value too.’

H If AFM takes off as a product it will be a big boost for the government agency which is charged with finding a market for recycled products. Crushed glass is already being used in road surfacing and in making tiles and bricks. Similarly. AFM could prove to have a widespread use and give green glass a cash value.

Questions 1-10
Reading Passage 1 has 8 paragraphs labelled A-H Which paragraph contains the following information? NB You may use any letter more than once.

1. a description of plans to expand production of AFM
2. the identification of a potential danger in the raw material for AFM
3. an example of AFM use in the export market
4. a comparison of the value of green glass and other types of glass
5. a list of potential applications of AFM in the domestic market
6. the conclusions drawn from laboratory checks on the process of AFM production
7. identification of current funding for the production of green sand
8. an explanation of the chosen brand name for crushed green glass
9. a description of plans for exporting AFM
10. a description of what has to happen before AFM is accepted for general use

Questions 11-14
Complete the summary below. Choose NO MORE THAN TWO WORDS from the passage for each answer.

Green sand
The use of crushed green glass (AFM) may have two significant impacts: it may help to save a diminishing (11)…………………….while at the same time solving a major problem for the (12)…………………..in the UK. However, according to Howard Dryden, only glass from bottles that have been used for (13)……………………..can be used in the production process. AFM is more effective than (14)…………………….as a water filter, and also has other uses.

NATURAL CHOICE Coffee and chocolate

When scientists from London’s Natural History Museum descended on the coffee farms of the tiny Central American republic of El Salvador, they were astonished to find such diversity of insect and plant species. During 18 months’ work on 12 farms, they found a third more species of parasitic wasp than are known to exist in the whole country of Costa Rica. They described four new species and are aware of a fifth. On 24 farms, they found nearly 300 species of tree when they had expected to find about 100.

El Salvador has lost much of its natural forest, with coffee farms covering nearly 10% of the country. Most of them use the ‘shade-grown’ method of production, which utilises a semi-natural forest ecosystem. Alex Munro, the museum’s botanist on the expedition, says: ‘Our findings amazed our insect specialist. There’s a very sophisticated food web present. The wasps, for instance, may depend on specific species of tree.’

It’s the same the world over. Species diversity is much higher where coffee is grown in shade conditions. In addition, coffee (and chocolate) is usually grown in tropical rainforest – regions that are biodiversity hotspots. ‘These habitats support up to 70% of the planets plant and animal species, and so the production methods of cocoa and coffee can have a hugely significant impact,’ explains Dr Paul Donald of the Royal Society for the. Protection of Birds.

So what does ‘shade-grown’ mean, and why is it good for wildlife? Most of the world’s coffee is produced by poor farmers in the developing world. Traditionally they have grown coffee (and cocoa) under the shade of selectively thinned tracts of rain forest in a genuinely sustainable form of farming. Leaf fall from the canopy provides a supply of nutrients and acts as a mulch that suppresses weeds. The insects that live in the canopy pollinate the cocoa and coffee and prey on pests. The trees also provide farmers with fruit and wood for fuel.

Bird diversity in shade-grown coffee plantations rivals that found in natural forests in the same region.’ says Robert Rice from the Smithsonian Migratory Bird Center. In Ghana, West Africa – one of the world’s biggest producers of cocoa – 90% of the cocoa is grown under shade, and these forest plantations are a vital habitat for wintering European migrant birds. In the same way, the coffee forests of Central and South America are a refuge for wintering North American migrants.

More recently, a combination of the collapse in the world market for coffee and cocoa and a drive to increase yields by producer countries has led to huge swathes of shade-grown coffee and cocoa being cleared to make way for a highly intensive, monoculture pattern of production known as ‘full sun’. But this system not only reduces the diversity of flora and fauna, it also requires huge amounts of pesticides and fertilisers. In Cote d’Ivoire, which produces more than half the world’s cocoa, more than a third of the crop is now grown in full-sun conditions.

The loggers have been busy in the Americas too, where nearly 70% of all Colombian coffee is now produced using full-sun production. One study carried out in Colombia and Mexico found that, compared with shade coffee, full-sun plantations have 95% fewer species of birds.

In El Salvador, Alex Munro says shade-coffee farms have a cultural as well as ecological significance and people are not happy to see them go. But the financial pressures are great, and few of these coffee farms make much money. ‘One farm we studied, a cooperative of 100 families, made just $10,000 a year, $100 per family and that’s not taking labour costs into account.’

The loss of shade-coffee forests has so alarmed a number of North American wildlife organisations that they are now harnessing consumer power to help save these threatened habitats. They are promoting a ‘certification’ system that can indicate to consumers that the beans have been grown on shade plantations. Bird-friendly coffee, for instance, is marketed by the Smithsonian Migratory Bird Center. The idea is that the small extra cost is passed directly on to the coffee farmers as a financial incentive to maintain their shade-coffee farms.

Not all conservationists agree with such measures, however. Some say certification could be leading to the loss not preservation of natural forests. John Rappole of the Smithsonian Conservation and Research Center, for example, argues that shade-grown marketing provides ‘an incentive to convert existing areas of primary forest that are too remote or steep to be converted profitably to other forms of cultivation into shade-coffee plantations’.

Other conservationists, such as Stacey Philpott and colleagues, argue the case for shade coffee. But there are different types of shade growing. Those used by subsistence farmers are virtually identical to natural forest (and have a corresponding diversity), while systems that use coffee plants as the understorey and cacao or citrus trees as the overstorey may be no more diverse than full-sun farms. Certification procedures need to distinguish between the two. and Ms.Philpott argues that as long as the process is rigorous and offers financial gains to the producers, shade growing does benefit the environment.

Questions 15-19
Do the following statements agree with the information given in Reading Passage 2? In boxes 15-19 on your answer sheet write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

15. More species survive on the farms studied by the researchers than in the natural El Salvador forests.
16. Nearly three-quarters of the Earth’s wildlife species can be found in shade- coffee plantations.
17. Farmers in El Salvador who have tried both methods prefer shade-grown plantations.
18. Shade plantations are important for migrating birds in both Africa and the Americas.
19. Full-sun cultivation can increase the costs of farming.

Questions 20-23
Look at the following opinions (Questions 20-23) and the list of people below. Match each opinion to the person credited with it. NB You can write any letter more than once.

20. Encouraging shade growing may lead to farmers using the natural forest for their plantations.
21. If shade-coffee farms match the right criteria, they can be good for wildlife.
22. There may be as many species of bird found on shade farms in a particular area, as in natural habitats there.
23. Currently, many shade-coffee farmers earn very little.

A Alex Munroe
B Paul Donald
C Robert Rice
D John Rappole
E Stacey Philpott

Questions 24-27
Classify the features described below as applying to

24. can be used on either coffee or cocoa plantations
25. is expected to produce bigger crops
26. documentation may be used to encourage sales
27. can reduce wildlife diversity

A the shade-grown method
B the full-sun method
C both shade-grown and full-sun methods

Painters of time

A The works of Aboriginal artists are now much in demand throughout the world, and not just in Australia, where they are already fully recognised: the National Museum of Australia, which opened in Canberra in 2001, designated 40% of its exhibition space to works by Aborigines. In Europe their art is being exhibited at a museum in Lyon, France, while the future Quai Branly museum in Paris, which will be devoted to arts and civilisations of Africa. Asia, Oceania and the Americas, plans to commission frescoes by artists from Australia.

B Their artistic movement began about 30 years ago. but its roots go back to time immemorial. All the works refer to the founding myth of the Aboriginal culture, ‘the Dreaming’. That internal geography, which is rendered with a brush and colours, is also the expression of the Aborigines’ long quest to regain the land which was stolen from them when Europeans arrived in the nineteenth century. ‘Painting is nothing without history.’ says one such artist. Michael Nelson Tjakamarra.

C There are now fewer than 400.000 Aborigines living in Australia. They have been swamped by the country’s 17.5 million immigrants. These original ‘natives’ have been living in Australia for 50.000 years, but they were undoubtedly maltreated by the newcomers. Driven back to the most barren lands or crammed into slums on the outskirts of cities, the Aborigines were subjected to a policy of ‘assimilation’, which involved kidnapping children to make them better ‘integrated’ into European society, and herding the nomadic Aborigines by force into settled communities.

D It was in one such community, Papunya, near Alice Springs, in the central desert, that Aboriginal painting first came into its own. In 1971, a white schoolteacher. Geoffrey Bardon, suggested to a group of Aborigines that they should decorate the school walls with ritual motifs. so as to pass on to the younger generation the myths that were starting to fade from their collective memory, the gave them brushes. colours and surfaces to paint on cardboard and canvases. He was astounded by the result. But their art did not come like a bolt from the blue: for thousands of years Aborigines had been ‘painting’ on the ground using sands of different colours, and on rock faces. They had also been decorating their bodies for ceremonial purposes. So there existed a formal vocabulary.

E This had already been noted by Europeans. In the early twentieth century. Aboriginal communities brought together by missionaries in northern Australia had been encouraged to reproduce on tree bark the motifs found on rock faces. Artists turned out a steady stream of works, supported by the churches, which helped to sell them to the public, and between 1950 and I960 Aboriginal paintings began to reach overseas museums. Painting on bark persisted in the north, whereas the communities in the central desert increasingly used acrylic paint, and elsewhere in Western Australia women explored the possibilities of wax painting and dyeing processes, known as ‘batik’.

F What Aborigines depict are always elements of the Dreaming, the collective history that each community is both part of and guardian of. The Dreaming is the story of their origins, of their ‘Great Ancestors’, who passed on their knowledge, their art and their skills (hunting, medicine, painting, music and dance) to man. ‘The Dreaming is not synonymous with the moment when the world was created.’ says Stephane Jacob, one of the organisers of the Lyon exhibition. ‘For Aborigines, that moment has never ceased to exist. It is perpetuated by the cycle of the seasons and the religious ceremonies which the Aborigines organise. Indeed the aim of those ceremonies is also to ensure the permanence of that golden age. The central function of Aboriginal painting, even in its contemporary manifestations, is to guarantee the survival of this world. The Dreaming is both past, present and future.’

G Each work is created individually, with a form peculiar to each artist, but it is created within and on behalf of a community who must approve it. An artist cannot use a ‘dream’ that does not belong to his or her community, since each community is the owner of its dreams, just as it is anchored to a territory marked out by its ancestors, so each painting can be interpreted as a kind of spiritual road map for that community.

H Nowadays, each community is organised as a cooperative and draws on the services of an art adviser, a government-employed agent who provides the artists with materials, deals with galleries and museums and redistributes the proceeds from sales among the artists. Today, Aboriginal painting has become a great success. Some works sell for more than $25,000, and exceptional items may fetch as much as $180,000 in Australia. ‘By exporting their paintings as though they were surfaces of their territory, by accompanying them to the temples of western art. the Aborigines have redrawn the map of their country, into whose depths they were exiled, says Yves Le Fur. of the Quai Branlv museum. ‘Masterpieces have been created. Their undeniable power prompts a dialogue that has proved all too rare in the history of contacts between the two cultures’.

Questions 28-33
Reading Passage 3 has nine paragraphs A-l. Choose the most suitable heading for paragraphs A-F from the list of headings below.

28. Paragraph A
29. Paragraph B
30. Paragraph C
31. Paragraph D
32. Paragraph E
33. Paragraph F

List of Headings
i Amazing results from a project
ii New religious ceremonies
iii Community art centres
iv Early painting techniques and marketing systems
v Mythology and history combined
vi The increasing acclaim for Aboriginal art
vii Belief in continuity
viii Oppression of a minority people

Questions 34-37
Complete the flow chart below. Choose NO MORE THAN THREE WORDS from the passage for each answer.

• For (34)…………………….Aborigines produced ground and rock paintings.
• Early twentieth century: churches first promoted the use of (35)………………for paintings.
• Mid-twentieth century: Aboriginal paintings were seen in (36)……………………
• Early 1970s: Aboriginal painted traditional patterns on (37)…………………..in one commodity

Questions 38-40
Choose the correct answer, A, B, C or D

38. In Paragraph G, the writer suggests that an important feature of Aboriginal art is
A its historical context.
B its significance to the group.
C its religious content.
D its message about the environment.

39. In Aboriginal beliefs, there is a significant relationship between
A communities and lifestyles.
B images and techniques.
C culture and form.
D ancestors and territory.

40. In Paragraph I. the writer suggests that Aboriginal art invites Westerners to engage with
A the Australian land.
B their own art.
C Aboriginal culture.
D their own history.

A song on the brain

A Everyone knows the situation where you can’t get a song out of your head. You hear a pop song on the radio – or even just read the song’s title and it haunts you for hours, playing over and over in your mind until you’re heartily sick of it. The condition now even has a medical name ‘song-in-head syndrome’.

В But why does the mind annoy us like this? No one knows for sure, but it’s probably because the brain is better at holding onto information than it is at knowing what information is important. Roger Chaffin, a psychologist at the University of Connecticut says, ‘It’s a manifestation of an aspect of memory which is normally an asset to us, but in this instance it can be a nuisance.’

С This eager acquisitiveness of the brain may have helped our ancestors remember important information in the past. Today, students use it to learn new material, and musicians rely on it to memorise complicated pieces. But when this useful function goes awry it can get you stuck on a tune. Unfortunately, superficial, repetitive pop tunes are, by their very nature, more likely to stick than something more inventive.

D The annoying playback probably originates in the auditory cortex. Located at the front of the brain, this region handles both listening and playback of music and other sounds. Neuroscientist Robert Zatorre of McGill University in Montreal proved this some years ago when he asked volunteers to replay the theme from the TV show Dallas in their heads. Brain imaging studies showed that this activated the same region of the auditory cortex as when the people actually heard the song.

E Not every stored musical memory emerges into consciousness, however. The frontal lobe of the brain gets to decide which thoughts become conscious and which ones are simply stored away. But it can become fatigued or depressed, which is when people most commonly suffer from song-in-head syndrome and other intrusive thoughts, says Susan Ball, a clinical psychologist at Indiana University School of Medicine in Indianapolis. And once the unwanted song surfaces, it’s hard to stuff it back down into the subconscious. ‘The more you try to suppress a thought, the more you get it,’ says Ball. ‘We call this the pink elephant phenomenon. Tell the brain not to think about pink elephants, and it’s guaranteed to do so,’ she says.

F For those not severely afflicted, simply avoiding certain kinds of music can help. ‘I know certain pieces that are kind of “sticky” to me, so I will not play them in the early morning for fear that they will run around in my head all day,’ says Steven Brown, who trained as a classical pianist but is now a neuroscientist at the University of Texas Health Science Center at San Antonio. He says he always has a song in his head and, even more annoying, his mind never seems to make it all the way through. ‘It tends to involve short fragments between, say, 5 or 15 seconds. They seem to get looped, for hours sometimes,’ he says.

G Brown’s experience of repeated musical loops may represent a phenomenon called ‘chunking’, in which people remember musical phrases as a single unit of memory, says Caroline Palmer, a psychologist at Ohio State University in Columbus. Most listeners have little choice about what chunks they remember. Particular chunks may be especially ‘sticky’ if you hear them often or if they follow certain predictable patterns, such as the chord progression of rock ‘n’ roll music. Palmer’s research shows that the more a piece of music conforms to these patterns, the easier it is to remember. That’s why you’re more likely to be haunted by the tunes of pop music than by those of a classical composer such as J. S. Bach.

H But this ability can be used for good as well as annoyance. Teachers can tap into memory reinforcement by setting their lessons to music. For example, in one experiment students who heard a history text set as the lyrics to a catchy song remembered the words better than those who simply read them, says Sandra Calvert, a psychologist at Georgetown University in Washington DC.

I This sort of memory enhancement may even explain the origin of music. Before the written word could be used to record history, people memorised it in songs, says Leon James, a psychologist at the University of Hawaii. And music may have had an even more important role. ‘All music has a message.’ he says. ‘This message functions to unite society and to standardise the thought processes of people in society.’

Questions 1-3
Choose the correct answer A, B, C or D

1. The writer says that song-in-head syndrome’ may occur because the brain
A confuses two different types of memory.
B cannot decide what information it needs to retain.
C has been damaged by harmful input.
D cannot hold onto all the information it processes.

2. A tune is more likely to stay in your head if
A it is simple and unoriginal.
B you have musical training.
C it is part of your culture.
D you have a good memory.

3. Robert Zatorre found that a part of the auditory cortex was activated when volunteers
A listened to certain types of music.
B learned to play a tune on an instrument.
C replayed a piece of music after several years.
D remembered a tune they had heard previously

Questions 4-7
Look at the following theories (Questions 4-7) and the list of people below. Match each theory with the person it is credited to.

4. The memorable nature of some tunes can help other learning processes.
5. Music may not always be stored in the memory in the form of separate notes.
6. People may have started to make music because of their need to remember things.
7. Having a song going round your head may happen to you more often when one part of the brain is tired.

A Roger Chaffin
B Susan Ball
C Steven Brown
D Caroline Palmer
E Sandra Calvert
F Leon James

Questions 8-13
Reading Passage 1 has nine paragraphs labelled A-l. Which paragraph contains the following information? NB You may use any letter more than once.

8. a claim that music strengthens social bonds
9. two reasons why some bits of music tend to stick in your mind more than others
10. an example of how the brain may respond in opposition to your wishes
11. the name of the part of the brain where song-in-head syndrome begins
12. examples of two everyday events that can set off song-m-head syndrome
13. a description of what one person does to prevent song-in-head syndrome

Worldly Wealth

The world’s population is expected to stablize at around nine billion. Will it be possible for nine billion people to have the lifestyle enjoyed today only by the wealthy? One school of thought says no: not only should the majority of the world’s people resign themselves to poverty forever, but rich nations must also revert to simpler lifestyles in order to save the planet.

Admittedly, there may be political or social barriers to achieving a rich world. But in fact there seems to be no insuperable physical or ecological reason why nine billion people should not achieve a comfortable lifestyle, using technology only slightly more advanced than that which we now possess. In thinking about the future of civilization, we ought to start by asking what people want. The evidence demonstrates that as people get richer they w ant a greater range of personal technology, they want lots of room (preferably near or in natural surroundings) and they w ant greater speed in travel. More possessions, more space, more mobility.

In the developed world, the personal technologies of the wealthy, including telephones, washing machines and ears, have become necessities within a generation or two. Increasing productivity that results m decreasing costs for such goods has been responsible for the greatest gains in the standard of living, and there is every reason to believe that this will continue.

As affluence grows, the amount of energy and raw- materials used for production of machinery w ill therefore escalate. But this need not mean an end to the machine age. Rather than being throw n away, materials from old machinery can be recycled by manufacturers. And long before all fossil fuels are exhausted, their rising prices may compel industrial society not only to become more energy efficient but also to find alternative energy sources sufficient for the demands of an advanced technological civilization nuclear fission, nuclear fusion, solar energy, chemical photosynthesis, geothermal, biomass or some yet unknown source of energy.

The growth of cities and suburbs is often seen as a threat to the environment. However, in fact the increasing amount of land consumed by agriculture is a far greater danger than urban sprawl. Stopping the growth of farms is the best way to preserve many of the world’s remaining wild areas. But is a dramatic downsizing of farmland possible? Thanks to the growth of agricultural productivity, reforestation and ‘re-wilding’ has been under way in the industrial countries for generations. Since 1950 more land in the US has been set aside in parks than has been occupied by urban and suburban growth. And much of what was farmland in the nineteenth century is now forest again. Taking the best Iowa maize growers as the norm for world food productivity, it has been calculated that less than a tenth of present cropland could support a population of 10 billion.

In The Environment Game, a vision of a utopia that would be at once high-tech and environmentalist. Nigel Calder suggested that ‘nourishing but unpalatable primary food produced by industrial techniques – like yeast from petroleum may be fed to animals, so that we can continue to eat our customary meat, eggs. milk, butter, and cheese and so that people in underdeveloped countries can have adequate supplies of animal protein for the first time.’

In the long run. tissue-cloning techniques could be used to grow desired portions of meat by themselves. Once their DNA has been extracted to create cow less steaks and chicken less drumsticks, domesticated species of livestock, bred for millennia to be stupid or to have grotesquely enhanced traits, should be allowed to become extinct, except for a few specimens in zoos. However, game such as wild deer, rabbits and wild ducks will be ever more abundant as farms revert to wilderness, so this could supplement the laboratory-grown meat in the diets of tomorrow’s affluent.

With rising personal incomes come rising expectations of mobility. This is another luxury of today’s rich that could become a necessity of tomorrow’s global population – particularly if its members choose to live widely dispersed in a post-agrarian wilderness. In his recent book Free Flight. James Fallows, a pilot as well as a writer, describes serious attempts by both state and private entrepreneurs in the USA to promote an ‘air taxi’ system within the price range of today’s middle class and perhaps tomorrow’s global population.

Two of the chief obstacles to the science fiction fantasy of the personal plane or hover car are price and danger. While technological improvements are driving prices down, piloting an aircraft in three dimensions is still more difficult than driving a car in two. and pilot error causes more fatalities than driver error. But before long our aircraft and cars will be piloted by computers which arc never tired or stressed.

So perhaps there are some grounds for optimism when viewing the future of civilization. With the help of technology, and without putting serious strains on the global environment, possessions, space and mobility can be achieved for all the projected population of the world.

Questions 14-19
Do the following statements reflect the claims of the writer in Reading Passage 2? In boxes 14-19 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

14. Today’s wealthy people ignore the fact that millions are living in poverty.
15. There are reasons why the future population of the world may not enjoy a comfortable lifestyle.
16. The first thing to consider when planning for the future is environmental protection.
17. As manufactured goods get cheaper, people will benefit more from them.
18. It may be possible to find new types of raw materials for use in the production of machinery.
19. The rising prices of fossil fuels may bring some benefits.

Questions 20-25
Complete the summary below. Choose ONE WORD ONLY from the passage for each answer.

Space for an increased population
According to the writer, the use of land for (20)…………………is the most serious threat to the environment. However, in the US. there has already been an increase in the amount of land used for (21)…………………..and forests. Far less land would be required to feed the world’s population if the (22)……………………of the land could be improved worldwide. It has also been claimed that the industrial production of animal foods could allow greater access to animal (23)…………………………by the entire world’s population.

Scientists could use (24)……………………from domesticated animals to help produce meat by tissue cloning, and these species could then be allowed to die out. In addition to this type of meat. (25)……………………will also be widely available.

Questions 26-27
Choose the correct answer, A. B, C or D

26. Greater mobility may be a feature of the future because of changes in
A the location of housing.
B patterns of employment.
C centres of transport.
D the distribution of wealth.

27. Air transport will be safe because of
A new types of aircraft.
B better training methods.
C three-dimensional models.
D improved technology.

Space: The Final Archaeological Frontier

In 1993, University of Hawaii’s anthropologist Ben Finney, who for much of his career has studied the technology once used by Polynesians to colonize islands in the Pacific, suggested that it would not be premature to begin thinking about the archaeology of Russian and American aerospace sites on the Moon and Mars. Finney pointed out that just as todays scholars use archaeological records to investigate how Polynesians diverged culturally as they explored the Pacific, archaeologists will someday study off-Earth sites to trace the development of humans in space. He realized that it was unlikely anyone would be able to conduct fieldwork in the near future, but he was convinced that one day such work would be done.

There is a growing awareness, however, that it won’t be long before both corporate adventurers and space tourists reach the Moon and Mars. There is a wealth of important archaeological sites from the history of space exploration on the Moon and Mars and measures need to be taken to protect these sites. In addition to the threat from profit- seeking corporations, scholars cite other potentially destructive forces such as souvenir hunting and unmonitored scientific sampling, as has already occurred in explorations of remote polar regions. Already in 1999 one company was proposing a robotic lunar rover mission beginning at the site of Tranquility Base and rumbling across the Moon from one archaeological site to another, from the wreck of the Ranger S probe to Apollo 17 s landing site. The mission, which would leave vehicle tyre- marks all over some of the most famous sites on the Moon, was promoted as a form of theme-park entertainment.

According to the vaguely worded United Motions Outer Space Treaty of 1967. what it terms ‘space junk’ remains the property of the country that sent the craft or probe into space. But the treaty doesn’t explicitly address protection of sites like Tranquility Base, and equating the remains of human exploration of the heavens with ‘space junk’ leaves them vulnerable to scavengers. Another problem arises through other international treaties proclaiming that land in space cannot be owned by any country or individual. This presents some interesting dilemmas for the aspiring manager of extraterrestrial cultural resources. Does the US own Neil Armstrong’s famous first footprints on the Moon but not the lunar dust in which they were recorded? Surely those footprints are as important in the story of human development as those left by hominids at Laetoli, Tanzania. But unlike the Laetoli prints, which have survived for 3.5 million years encased in cement-like ash. those at Tranquility Base could be swept away with a casual brush of a space tourist’s hand. To deal with problems like these, it may be time to look to innovative international administrative structures for the preservation of historic remains on the new frontier.

The Moon, with its wealth of sites, will surely be the first destination of archaeologists trained to work in space. But any young scholars hoping to claim the mantle of history’s first lunar archaeologist will be disappointed. That distinction is already taken. On November 19. 1969. astronauts Charles Conrad and Alan Bean made a difficult manual landing of the Apollo 12 lunar module in the Moon’s Ocean of Storms, just a few hundred feet from an unmanned probe. Surveyor J. that had landed in a crater on April 19. 1967. Unrecognized at the time, this was an important moment in the history of science. Bean and Conrad were about to conduct the first archaeological studies on the Moon.

After the obligatory planting of the American flag and some geological sampling, Conrad and Bean made their way to Surveyor 3. They observed that the probe had bounced after touchdown and carefully photographed the impressions made by its footpads. The whole spacecraft was covered in dust, perhaps kicked up by the landing. The astronaut-archaeologists carefully removed the probes television camera, remote sampling arm. and pieces of tubing. They bagged and labelled these artefacts, and stowed them on board their lunar module. On their return to Earth, they passed them on to the Daveson Space Center in Houston, Texas, and the Hughes Air and Space Corporation in bl Segundo, California. There, scientists analyzed the changes in these aerospace artefacts.

One result of the analysis astonished them. A fragment of the television camera revealed evidence of the bacteria Streptococcus mitis. I or a moment it was thought Conrad and Bean had discovered evidence for life on the Moon, but after further research the real explanation became apparent. While the camera was being installed in the probe prior to the launch, someone sneezed on it. The resulting bacteria had travelled to the Moon, remained in an alternating freezing.’ boiling vacuum for more than two years, and returned promptly to life upon reaching the safety of a laboratory back on Earth.

The finding that not even the vastness of space can stop humans from spreading a sore throat was an unexpected spin-off. But the artefacts brought back by Rean and Conrad have a broader significance. Simple as they may seem, they provide the first example of extraterrestrial archaeology and perhaps more significant for the history of the discipline formational archaeology, the study of environmental and cultural forces upon the life history of human artefacts in space.

Questions 28-33
Complete each sentence with the correct ending A-H from the box below.

A activities of tourists and scientists have harmed the environment.
B some sites in space could be important in the history of space exploration.
C vehicles used for tourism have polluted the environment.
D it may be unclear who has responsibility for historic human footprints.
E past explorers used technology in order to find new places to live.
F man-made objects left in space are regarded as rubbish.
G astronauts may need to work more closely with archaeologists.
H important sites on the Moon may be under threat.

28. Ben Finney’s main academic work investigates the way that
29. Ben Finney thought that in the long term
30. Commercial pressures mean that in the immediate future
31. Academics are concerned by the fact that in isolated regions on Earth.
32. One problem with the 1967 UN treaty is that
33. The wording of legal agreements over ownership of land in space means that

Questions 34-38
Complete the flow chart below. Choose NO MORE THAN ONE WORD from the passage for each answer.

• During the assembly of the Surveyor 3 probe, someone (34)……………………..on a TV camera
• The TV Camera was carried to the Moon on Surveyor 3
• The TV Camera remained on the Moon for over (35)………………….years
• Apollo 12 astronauts (36)……………………the TV camera
• The TV camera was returned to Earth for (37)……………………….
• The Streptococcus mitis bacteria were found.
• The theory that this suggested there was (38)…………………on the Moon was rejected.
• Scientists concluded that the bacteria can survive lunar conditions.

Questions 39-40
Choose TWO letters A-E

The TWO main purposes of the writer of this text are to explain

A the reasons why space archaeology is not possible
B the dangers that could follow from contamination of objects from space
C the need to set up careful controls over space tourism
D the need to preserve historic sites and objects in space
E the possible cultural effects of space travel

Why Risks Can Go Wrong

A People make terrible decisions about the future. The evidence is all around, from their investments in the stock markets to the way they run their businesses. In fact, people are consistently bad at dealing with uncertainty, underestimating some kinds of risk and overestimating others. Surely there must be a better way than using intuition?

B In the 1960s a young American research psychologist, Daniel Kahneman, became interested in people’s inability to make logical decisions. That launched him on a career to show just how irrationally people behave in practice. When Kahneman and his colleagues first started work, the idea of applying psychological insights to economics and business decisions was seen as rather bizarre. But in the past decade the fields of behavioural finance and behavioural economics have blossomed, and in 2002 Kahneman shared a Nobel prize in economics for his work. Today he is in demand by business organizations and international banking companies. But, he says, there are plenty of institutions that still fail to understand the roots of their poor decisions. He claims that, far from being random, these mistakes are systematic and predictable.

C One common cause of problems in decision-making is over-optimism. Ask most people about the future, and they will see too much blue sky ahead, even if past experience suggests otherwise. Surveys have shown that people’s forecasts of future stock market movements are far more optimistic than past long-term returns would justify. The same goes for their hopes of ever-rising prices for their homes or doing well in games of chance. Such optimism can be useful for managers or sportsmen, and sometimes turns into a self-fulfilling prophecy. But most of the time it results in wasted effort and dashed hopes. Kahneman’s work points to three types of over-confidence. First, people tend to exaggerate their own skill and prowess; in polls, far fewer than half the respondents admit to having below-average skills in, say, driving. Second, they overestimate the amount of control they have over the future, forgetting about luck and chalking up success solely to skill. And third, in competitive pursuits such as dealing on shares, they forget that they have to judge their skills against those of the competition.

D Another source of wrong decisions is related to the decisive effect of the initial meeting, particularly in negotiations over money. This is referred to as the ‘anchor effect’. Once a figure has been mentioned, it takes a strange hold over the human mind. The asking price quoted in a house sale, for example, tends to become accepted by all parties as the ‘anchor’ around which negotiations take place. Much the same goes for salary negotiations or mergers and acquisitions. If nobody has much information to go on, a figure can provide comfort – even though it may lead to a terrible mistake.

E In addition, mistakes may arise due to stubbornness. No one likes to abandon a cherished belief, and the earlier a decision has been taken, the harder it is to abandon it. Drug companies must decide early to cancel a failing research project to avoid wasting money, but may find it difficult to admit they have made a mistake. In the same way, analysts may have become wedded early to a single explanation that coloured their perception. A fresh eye always helps.

F People also tend to put a lot of emphasis on things they have seen and experienced themselves, which may not be the best guide to decision-making. For example, somebody may buy an overvalued share because a relative has made thousands on it, only to get his fingers burned. In finance, too much emphasis on information close at hand helps to explain the tendency by most investors to invest only within the country they live in. Even though they know that diversification is good for their portfolio, a large majority of both Americans and Europeans invest far too heavily in the shares of their home countries. They would be much better off spreading their risks more widely.

G More information is helpful in making any decision but, says Kahneman, people spend proportionally too much time on small decisions and not enough on big ones. They need to adjust the balance. During the boom years, some companies put as much effort into planning their office party as into considering strategic mergers.

H Finally, crying over spilled milk is not just a waste of time; it also often colours people’s perceptions of the future. Some stock market investors trade far too frequently because they are chasing the returns on shares they wish they had bought earlier.

I Kahneman reckons that some types of businesses are much better than others at dealing with risk. Pharmaceutical companies, which are accustomed to many failures and a few big successes in their drug-discovery programmes, are fairly rational about their risk-taking. But banks, he says, have a long way to go. They may take big risks on a few huge loans, but are extremely cautious about their much more numerous loans to small businesses, many of which may be less risky than the big ones. And the research has implications for governments too. They face a whole range of sometimes conflicting political pressures, which means they are even more likely to take irrational decisions.

Questions 1-6
Reading Passage 1 has nine paragraphs A-I. Choose the correct heading for Paragraphs B and D-H from the list of headings below.

1. Paragraph B
2. Paragraph D
3. Paragraph E
4. Paragraph F
5. Paragraph G
6. Paragraph H

List of headings
i Not identifying the correct priorities
ii A solution for the long term
iii The difficulty of changing your mind
iv Why looking back is unhelpful
v Strengthening inner resources
vi A successful approach to the study of decision-making
vii The danger of trusting a global market
viii Reluctance to go beyond the familiar
ix The power of the first number
x The need for more effective risk assessment
xi Underestimating the difficulties ahead

Questions 7-10
Choose the correct answer A, B, C or D

7. People initially found Kahneman’s work unusual because he
A saw mistakes as following predictable patterns.
B was unaware of behavioural approaches.
C dealt with irrational types of practice.
D applied psychology to finance and economics

8. The writer mentions house-owners attitudes towards the value of their homes to illustrate that
A past failures may destroy an optimistic attitude.
B people tend to exaggerate their chances of success.
C optimism may be justified in certain circumstances.
D people are influenced by the success of others.

9. Stubbornness and inflexibility can cause problems when people
A think their financial difficulties are just due to bad luck.
B avoid seeking advice from experts and analysts.
C refuse to invest in the early stages of a project.
D are unwilling to give up unsuccessful activities or beliefs.

10. Why do many Americans and Europeans fail to spread their financial risks when investing?
A They feel safer dealing in a context which is close to home.
B They do not understand the benefits of diversification.
C They are over-influenced by the successes of their relatives.
D They do not have sufficient knowledge of one another’s countries.

Questions 11-13
Answer the questions below, using NO MORE THAN THREE WORDS for each answer.

11. Which two occupations may benefit from being over-optimistic?
12. Which practical skill are many people over-confident about?
13. Which type of business has a generally good attitude to dealing with uncertainty?

Reading Passage 2

There has always been a sense in which America and Europe owned film. They invented it at the end of the nineteenth century in unfashionable places like New Jersey, Leeds and the suburbs of Lyons. At first, they saw their clumsy new camera-projectors merely as more profitable versions of Victorian lantern shows, mechanical curiosities which might have a use as a sideshow at a funfair. Then the best of the pioneers looked beyond the fairground properties of their invention. A few directors, now mostly forgotten, saw that the flickering new medium was more than just a diversion. This crass commercial invention gradually began to evolve as an art. D W Griffith in California glimpsed its grace, German directors used it as an analogue to the human mind and the modernising city, Soviets emphasised its agitational and intellectual properties, and the Italians reconfigured it on an operatic scale.

So heady were these first decades of cinema that America and Europe can be forgiven for assuming that they were the only game in town. In less than twenty years western cinema had grown out of all recognition; its unknowns became the most famous people in the world; it made millions. It never occurred to its financial backers that another continent might borrow their magic box and make it its own. But film industries were emerging in Shanghai, Bombay and Tokyo, some of which would outgrow those in the west.

Between 1930 and 1935, China produced more than 500 films, mostly conventionally made in studios in Shanghai, without soundtracks. China’s best directors – Bu Wancang and Yuan Muzhi – introduced elements of realism to their stories. The Peach Girl (1931) and Street Angel (1937) are regularly voted among the best ever made in the country.

India followed a different course. In the west, the arrival of talkies gave birth to a new genre – the musical – but in India, every one of the 5000 films made between 1931 and the mid-1950s had musical interludes. The films were stylistically more wide ranging than the western musical, encompassing realism and escapist dance within individual sequences, and they were often three hours long rather than Hollywood’s 90 minutes. The cost of such productions resulted in a distinctive national style of cinema. They were often made in Bombay, the centre of what is now known as ‘Bollywood’. Performed in Hindi (rather than any of the numerous regional languages), they addressed social and peasant themes in an optimistic and romantic way and found markets in the Middle East, Africa and the Soviet Union.

In Japan, the film industry did not rival India’s in size but was unusual in other ways. Whereas in Hollywood the producer was the central figure, in Tokyo the director chose the stories and hired the producer and actors. The model was that of an artist and his studio of apprentices. Employed by a studio as an assistant, a future director worked with senior figures, learned his craft, gained authority, until promoted to director with the power to select screenplays and performers. In the 1930s and 40s, this freedom of the director led to the production of some of Asia’s finest films.

The films of Kenji Mizoguchi were among the greatest of these. Mizoguchi’s films were usually set in the nineteenth century and analysed the way in which the lives of the female characters whom he chose as his focus were constrained by the society of the time. From Osaka Elegy (1936) to Ugetsu Monogatari (1953) and beyond, he evolved a sinuous way of moving his camera in and around a scene, advancing towards significant details but often retreating at moments of confrontation or strong feeling. No one had used the camera with such finesse before.

Even more important for film history, however, is the work of the great Ozu. Where Hollywood cranked up drama, Ozu avoided it. His camera seldom moved. It nestled at seated height, framing people square on, listening quietly to their words. Ozu rejected the conventions of editing, cutting not on action, as is usually done in the west, but for visual balance. Even more strikingly, Ozu regularly cut away from his action to a shot of a tree or a kettle or clouds, not to establish a new location but as a moment of repose. Many historians now compare such ‘pillow shots’ to the Buddhist idea that mu – empty space or nothing – is itself an element of composition.

As the art form most swayed by money and market, cinema would appear to be too busy to bother with questions of philosophy. The Asian nations proved and are still proving that this is not the case. Just as deep ideas about individual freedom have led to the aspirational cinema of Hollywood, so it is the beliefs which underlie cultures such as those of China and Japan that explain the distinctiveness of Asian cinema at its best. Yes, these films are visually striking, but it is their different sense of what a person is, and what space and action are, which makes them new to western eye.

Questions 14-18
Do the following statements agree with the information given in Reading Passage 2? In boxes 14-18 on your answer sheet write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

14. The inventors of cinema regarded it as a minor attraction.
15. Some directors were aware of cinema’s artistic possibilities from the very beginning.
16. The development of cinema’s artistic potential depended on technology.
17. Cinema’s possibilities were developed in varied ways in different western countries.
18. Western businessmen were concerned about the emergence of film industries in other parts of the world.

Questions 19-25
Complete the notes below using the list of words (A-K) from the list below.

Chinese cinema
large number of (19)……………………films produced in 1930s some early films still generally regarded as (20)………………..

Indian cinema
• films included musical interludes
• films avoided (21)……………..topics

Japanese cinema
• unusual because film director was very (22)……………………..
• two important directors:

Mizoguchi – focused on the (23)……………restrictions faced by women

– camera movement related to (24)…………………content of film

Ozu – (25)…………………..camera movement

A emotional
B negative
C expensive
D silent
E social
F outstanding
G little
H powerful
I realistic
J stylistic
K economic

Question 26

26. Which of the following is the most suitable title for Reading Passage 2?
A Blind to change: how is it that the west has ignored Asian cinema for so long?
B A different basis: how has the cinema of Asian countries been shaped by their cultures and beliefs?
C Outside Asia: how did the origins of cinema affect its development worldwide?
D Two cultures: how has western cinema tried to come to terms with the challenge of the Asian market?

Quiet Roads Ahead

A The noise produced by busy roads is a growing problem. While vehicle designers have worked hard to quieten engines, they have been less successful elsewhere. The sound created by the tyres on the surface of the road now accounts for more than half the noise that vehicles create, and as road building and car sales continue to boom – particularly in Asia and the US – this is turning into a global issue.

B According to the World Health Organization, exposure to noise from road traffic over long periods can lead to stress-related health problems. And where traffic noise exceeds a certain threshold, road builders have to spend money erecting sound barriers and installing double glazing in blighted homes. Houses become harder to sell where environmental noise is high, and people are not as efficient or productive at work.

C Already, researchers in the Netherlands – one of the most densely populated countries in the world – are working to develop techniques for silencing the roads. In the next five years the Dutch government aims to have reduced noise levels from the country’s road surfaces by six decibels overall. Dutch mechanical engineer Ard Kuijpers has come up with one of the most promising, and radical, ideas. He set out to tackle the three most important factors: surface texture, hardness and ability to absorb sound.

D The rougher the surface, the more likely it is that a tyre will vibrate and create noise. Road builders usually eliminate bumps on freshly laid asphalt with heavy rollers, but Kuijpers has developed a method of road building that he thinks can create the ultimate quiet road. His secret is a special mould 3 metres wide and 50 metres long. Hot asphalt, mixed with small stones, is spread into the mould by a railmounted machine which flattens the asphalt mix with a roller. When it sets, the 10-millimetre-thick sheet has a surface smoother than anything that can be achieved by conventional methods.

E To optimise the performance of his road surface – to make it hard wearing yet soft enough to snuff out vibrations – he then adds another layer below the asphalt. This consists of a 30-millimetre-thick layer of rubber, mixed with stones which are larger than those in the layer above. ‘It’s like a giant mouse mat, making the road softer,’ says Kuijpers.

F The size of the stones used in the two layers is important, since they create pores of a specific size in the road surface. Those used in the top layer are just 4 or 5 millimetres across, while the ones below are approximately twice that size – about 9 millimetres. Kuijpers says the surface can absorb any air that is passing through a tyre’s tread (the indentations or ridges on the surface of a tyre), damping oscillations that would otherwise create noise. And in addition they make it easier for the water to drain away, which can make the road safer in wet weather.

G Compared with the complex manufacturing process, laying the surface is quite simple. It emerges from the factory rolled, like a carpet, onto a drum 1.5 metres in diameter. On site, it is unrolled and stuck onto its foundation with bitumen. Even the white lines are applied in the factory.

H The foundation itself uses an even more sophisticated technique to reduce noise further. It consists of a sound-absorbing concrete base containing flask-shaped slots up to 10 millimetres wide and 30 millimetres deep that are open at the top and sealed at the lower end. These cavities act like Helmholtz resonators – when sound waves of specific frequencies enter the top of a flask, they set up resonances inside and the energy of the sound dissipates into the concrete as heat. The cavities play another important role: they help to drain water that seeps through from the upper surface. This flow will help flush out waste material and keep the pores in the outer layers clear.

I Kuijpers can even control the sounds that his resonators absorb, simply by altering their dimensions. This could prove especially useful since different vehicles produce noise at different frequencies. Car tyres peak at around 1000 hertz, for example, but trucks generate lower-frequency noise at around 600 hertz. By varying the size of the Kuijpers resonators, it is possible to control which frequencies the concrete absorbs. On large highways, trucks tend to use the inside lane, so resonators here could be tuned to absorb sounds at around 600 hertz while those in other lanes could deal with higher frequency noise from cars.

J Kuijpers believes he can cut noise by five decibels compared to the quietest of today’s roads. He has already tested a l00-metre-long section of his road on a motorway near Apeldoorn, and Dutch construction company Heijmans is discussing the location of the next roll-out road with the country’s government. The success of Kuijpers’ design will depend on how much it eventually costs. But for those affected by traffic noise there is hope of quieter times ahead.

Questions 27-32
Reading Passage 3 has ten paragraphs labelled A-J. Which paragraph contains the following information?

27. a description of the form in which Kuijpers’ road surface is taken to its destination
28. an explanation of how Kuijpers makes a smooth road surface
29. something that has to be considered when evaluating Kuijpers’ proposal
30. various economic reasons for reducing road noise
31. a generalisation about the patterns of use of vehicles on major roads
32. a summary of the different things affecting levels of noise on roads

Questions 33-35
Label the diagram below. Choose NO MORE THAN ONE WORD AND/OR A NUMBER from the passage for each answer.

Questions 36-40
Complete the table below using the list of words (A-K) from the box below.

Kuijpers’ noise-reducing road: Components and function

Layer	Component	Function
Upper and lower	stones	– reduce oscillations caused by (36)……………. – create pores which help (37)……………
Foundation	slots	– convert (38)…………….to heat – help to remove (39)……………. – can be adapted to absorb different (40)…………………

A frequencies
B the engine
C rubbish
D resonators
E air flow
F dissipation
G sound energy
H pores
I lanes
J drainage
K sources

Snow-makers

A In the early to mid twentieth century, with the growing popularity of skiing, ski slopes became extremely profitable businesses. But ski resort owners were completely dependent on the weather: if it didn’t snow, or didn’t snow enough, they had to close everything down. Fortunately, a device called the snow gun can now provide snow whenever it is needed. These days such machines are standard equipment in the vast majority of ski resorts around the world, making it possible for many resorts to stay open for months or more a year.

B Snow formed by natural weather systems comes from water vapour in the atmosphere. The water vapour condenses into droplets, forming clouds. If the temperature is sufficiently low, the water droplets freeze into tiny ice crystals. More water particles then condense onto the crystal and join with it to form a snowflake. As the snow flake grows heavier, it falls towards the Earth.

C The snow gun works very differently from a natural weather system, but it accomplishes exactly the same thing. The device basically works by combining water and air. Two different hoses are attached to the gun. one leading from a water pumping station which pumps water up from a lake or reservoir, and the other leading from an air compressor. When the compressed air passes through the hose into the gun. it atomises the water – that is, it disrupts the stream so that the water splits up into tiny droplets. The droplets are then blown out of the gun and if the outside temperature is below 0°C, ice crystals will form, and will then make snowflakes in the same way as natural snow.

D Snow-makers often talk about dry snow and wet snow. Dry snow has a relatively low amount of water, so it is very light and powdery. This type of snow is excellent for skiing because skis glide over it easily without getting stuck in wet slush. One of the advantages of using a snow-maker is that this powdery snow can be produced to give the ski slopes a level surface. However, on slopes which receive heavy use, resort owners also use denser, wet snow underneath the dry snow. Many resorts build up the snow depth this way once or twice a year, and then regularly coat the trails with a layer of dry snow throughout the winter.

E The wetness of snow is dependent on the temperature and humidity outside, as well as the size of the water droplets launched by the gun. Snow-makers have to adjust the proportions of water and air in their snow guns to get the perfect snow consistency for the outdoor weather conditions. Many ski slopes now do this with a central computer system that is connected to weather-reading stations all over the slope.

F But man-made snow makes heavy demands on the environment. It takes about 275,000 litres of water to create a blanket of snow covering a 60×60 metre area. Most resorts pump water from one or more reservoirs located in low-lying areas. The run-off water from the slopes feeds back into these reservoirs, so the resort can actually use the same water over and over again. However, considerable amounts of energy are needed to run the large air-compressing pumps, and the diesel engines which run them also cause air pollution.

G Because of the expense of making snow, ski resorts have to balance the cost of running the machines with the benefits of extending the ski season, making sure they only make snow when it is really needed and when it will bring the maximum amount of profit in return for the investment. But man-made snow has a number of other uses as well. A layer of snow keeps a lot of the Earth’s heat from escaping into the atmosphere, so farmers often use man-made snow to provide insulation for winter crops. Snow-making machines have played a big part in many movie productions. Movie producers often take several months to shoot scenes that cover just a few days. If the movie takes place in a snowy setting, the set decorators have to get the right amount of snow for each day of shooting either by adding man-made snow or melting natural snow. And another important application of man-made snow is its use in the tests that aircraft must undergo in order to ensure that they can function safely in extreme conditions.

Questions 1-5
Reading Passage 1 has seven paragraphs A-G. Choose the correct heading for each paragraph from the list of headings below.

List of Headings
i Considering ecological costs
ii Modifications to the design of the snow gun
iii The need for different varieties of snow
iv Local concern over environmental issues
v A problem and a solution
vi Applications beyond the ski slopes
vii Converting wet snow to dry snow
viii New method for calculating modifications
ix Artificial process, natural product
x Snow formation in nature

1. Paragraph C
2. Paragraph D
3. Paragraph E
4. Paragraph F
5. Paragraph G

Questions 6-8
Label the diagram below using NO MORE THAN TWO WORDS from the passage for each answer.

Questions 9-13
Complete the sentences below. Choose NO MORE THAN THREE WORDS from the passage for each answer.

Dry snow is used to give slopes a level surface, while wet snow is used to increase the (9)……………………on busy slopes.

To calculate the required snow consistency, the (10)…………………of the atmosphere must first be measured.

The machinery used in the process of making the snow consumes a lot of (11)…………………..which is damaging to the environment.

Artificial snow is used in agriculture as a type of (12)…………………..for plants in cold conditions.

Artificial snow may also be used in carrying out safety checks on (13)……………….

Why are so few tigers man-eaters?

A As you leave the Bandhavgarh National Park in central India, there is a notice which shows a huge, placid tiger. The notice says, ‘You may not have seen me, but I have seen you.’ There are more than a billion people In India and Indian tigers probably see humans every single day of their lives. Tigers can and do kill almost everything they meet in the jungle, they will kill even attack elephants and rhino. Surely, then, it is a little strange that attacks on humans are not more frequent.

B Some people might argue that these attacks were in fact common in the past. British writers of adventure stories, such as Jim Corbett, gave the impression that village life in India in the early years of the twentieth century involved a stage of constant siege by man-eating tigers. But they may have overstated the terror spread by tigers. There were also far more tigers around in those days (probably 60.000 in the subcontinent compared to just 3000 today). So in proportion, attacks appear to have been as rare then as they are today.

C It is widely assumed that the constraint is fear; but what exactly are tigers afraid of? Can they really know that we may be even better armed than they are? Surely not. Has the species programmed the experiences of all tigers with humans its genes to be inherited as instinct? Perhaps. But I think the explanation may be more simple and, in a way, more intriguing.

D Since the growth of ethology in the 1950s. we have tried to understand animal behaviour from the animal’s point of view. Until the first elegant experiments by pioneers in the field such as Konrad Lorenz, naturalists wrote about animals as if they were slightly less intelligent humans. Jim Corbett’s breathless accounts of his duels with a an-eaters in truth tell us more about Jim Corbett than they do about the animals. The principle of ethology, on the other hand, requires us to attempt to think in the same way as the animal we are studying thinks, and to observe every tiny detail of its behaviour without imposing our own human significances on its actions.

E I suspect that a tiger’s afraid of humans lies not in some preprogramed ancestral logic but in the way he actually perceives us visually. If you think like a tiger, a human in a car might appear just to be a part of the car, and because tigers don’t eat cars the human is safe-unless the car is menacing the tiger or its cubs, in which case a brave or enraged tiger may charge. A human on foot is a different sort of puzzle. Imagine a tiger sees a man who is 1.8m tall. A tiger is less than 1m tall but they may be up to 3m long from head to tail. So when a tiger sees the man face on, it might not be unreasonable for him to assume that the man is 6m long. If he meet a deer of this size, he might attack the animal by leaping on its back, but when he looks behind the mind he can’t see a back. From the front the man is huge, but looked at from the side he all but disappears. This must be very disconcerting. A hunter has to be confident that it can tackle its prey, and no one is confident when they are disconcerted. This is especially true of a solitary hunter such as the tiger and may explain why lions-particularly young lionesses who tend to encourage one another to take risks are more dangerous than tigers.

F If the theory that a tiger is disconcerted to find that a standing human is both very big and yet somehow invisible is correct, the opposite should be true of a squatting human. A squatting human is half he size and presents twice the spread of back, and more closely resembles a medium-sized deer. If tigers were simply frightened of all humans, then a squatting person would be no more attractive as a target than a standing one. This, however appears not to be the case. Many incidents of attacks on people involving villagers squatting or bending over to cut grass for fodder or building material.

G The fact that humans stand upright may therefore not just be something that distinguishes them from nearly all other species, but also a factor that helped them to survive in a dangerous and unpredictable environment.

Questions 14-18
Reading Passage 2 has seven paragraphs labelled A-G. Which paragraph contains the following information?

14. a rejected explanation of why tiger attacks on humans are rare
15. a reason why tiger attacks on humans might be expected to happen more often than they do
16. examples of situations in which humans are more likely to be attacked by tigers
17. a claim about the relative frequency of tiger attacks on humans
18. an explanation of tiger behaviour based on the principles of ethology

Questions 19-23
Do the following statements agree with the information given in Reading Passage 2? In boxes 19-23 on your answer sheet write

TRUE if the statement agrees with the information
FALSE if the statement contradicts the information
NOT GIVEN If there is no information on this

19. Tigers in the Bandhavgarh National Park are a protected species.
20. Some writers of fiction have exaggerated the danger of tigers to man.
21. The fear of humans may be passed down in a tiger’s genes.
22. Konrad Lorenz claimed that some animals are more intelligent than humans.
23. Ethology involves applying principles of human behaviour to animals.

Questions 24-26
Choose the correct answer, A. B C or D

24. Why do tigers rarely attack people in cars?
A They have learned that cars are not dangerous.
B They realise that people in cars cannot be harmed.
C They do not think people in cars are living creatures.
D They do not want to put their cubs at risk

25. The writer says that tigers rarely attack a man who is standing up because
A they are afraid of the man s height.
B they are confused by the man’s shape.
C they are puzzled by the man s lack of movement.
D they are unable to look at the man directly.

26. A human is more vulnerable to tiger attack when squatting because
A he may be unaware of the tiger’s approach.
B he cannot easily move his head to see behind him.
C his head becomes a better target for the tiger.
D his back appears longer in relation to his height

Keep taking the tablets

The history of aspirin is a product of a rollercoaster ride through time, of accidental discoveries, intuitive reasoning and intense corporate rivalry.

In the opening pages of Aspirin: The Remarkable Story of a Wonder Drug, Diarmuid Jeffreys describes this little white pill as ‘one of the most amazing creations in medical history, a drug so astonishingly versatile that it can relieve headache, ease your aching limbs, lower your temperature and treat some of the deadliest human diseases’.

Its properties have been known for thousands of years. Ancient Egyptian physicians used extracts from the willow tree as an analgesic, or pain killer. Centuries later the Greek physician Hippocrates recommended the bark of the willow tree as a remedy for the pains of childbirth and as a fever reducer. But it wasn’t until the eighteenth and nineteenth centuries that salicylates the chemical found in the willow tree became the subject of serious scientific investigation. The race was on to identify the active ingredient and to replicate it synthetically. At the end of the nineteenth century a German company, Friedrich Bayer & Co. succeeded in creating a relatively safe and very effective chemical compound, acetylsalicylic acid, which was renamed aspirin.

The late nineteenth century was a fertile period for experimentation, partly because of the hunger among scientists to answer some of the great scientific questions, but also because those questions were within their means to answer. One scientist in a laboratory with some chemicals and a test tube could make significant breakthroughs whereas today, in order to map the human genome for instance, one needs ‘an army of researchers, a bank of computers and millions and millions of dollars’.

But an understanding of the nature of science and scientific inquiry is not enough on its own to explain how society innovates. In the nineteenth century, scientific advance was closely linked to the industrial revolution. This was a period when people frequently had the means, motive and determination to take an idea and turn it into reality. In the case of aspirin that happened piecemeal – a series of minor, often unrelated advances, fertilised by the century’s broader economic, medical and scientific developments, that led to one big final breakthrough.

The link between big money and pharmaceutical innovation is also a significant one. Aspirin is continued shelf life was ensured because for the first 70 years of its life, huge amounts of money were put into promoting it as an ordinary everyday analgesic. In the 1070s other analgesics, such as ibuprofen and paracetamol, were entering the market, and the pharmaceutical companies then focused on publicising these new drugs. But just at the same time, discoveries were made regarding the beneficial role of aspirin in preventing heart attacks, strokes and other afflictions. Had it not been for these findings, this pharmaceutical marvel may well have disappeared.

So the relationship between big money and drugs is an odd one. Commercial markets are necessary for developing new products and ensuring that they remain around long enough for scientists to carry out research on them. But the commercial markets are just as likely to kill off’ certain products when something more attractive comes along. In the case of aspirin, a potential ‘wonder drug* was around for over 70 years without anybody investigating the way in which it achieved its effects, because they were making more than enough money out of it as it was. If ibuprofen or paracetamol had entered the market just a decade earlier, aspirin might then not be here today. It would be just another forgotten drug that people hadn’t bothered to explore.

None of the recent discoveries of aspirin’s benefits were made by the big pharmaceutical companies; they were made by scientists working in the public sector. ‘The reason for that is very simple and straightforward,’ Jeffreys says in his book. ‘Drug companies will only pursue research that is going to deliver financial benefits. There’s no profit in aspirin any more. It is incredibly inexpensive with tiny profit margins and it has no patent any more, so anyone can produce it.’ In fact, there’s almost a disincentive for drug companies to further boost the drug, he argues, as it could possibly put them out of business by stopping them from selling their more expensive brands.

So what is the solution to a lack of commercial interest in further exploring the therapeutic benefits of aspirin? More public money going into clinical trials, says Jeffreys. ‘If I were the Department of Health. I would say “this is a very inexpensive drug. There may be a lot of other things we could do with it.” We should put a lot more money into trying to find out.’ Jeffreys’ book which not only tells the tale of a ‘wonder drug’ but also explores the nature of innovation and the role of big business, public money and regulation reminds us why such research is so important.

Questions 27-32
Complete each sentence with the correct ending A-H from the list below.

A the discovery of new medical applications.
B the negative effects of publicity.
C the large pharmaceutical companies.
D the industrial revolution.
E the medical uses of a particular tree
F the limited availability of new drugs.
G the chemical found in the willow tree.
H commercial advertising campaigns.

27. Ancient Egyptian and Greek doctors were aware of
28. Frederick Bayer & Co were able to reproduce
29. The development of aspirin was partly due to the effects of
30. The creation of a market for aspirin as a painkiller was achieved through
31. Aspirin might have become unavailable without
32. The way in which aspirin actually worked was not investigated by

Questions 33-37
Do the following statements agree with the views of the writer in Reading Passage 3? In boxes 33-37 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

33. For nineteenth-century scientists, small-scale research was enough to make important discoveries.
34. The nineteenth-century industrial revolution caused a change in the focus of scientific research.
35. The development of aspirin in the nineteenth century followed a structured pattern of development.
36. In the 1970s sales of new analgesic drugs overtook sales of aspirin.
37. Commercial companies may have both good and bad effects on the availability of pharmaceutical products.

Questions 38-40
Complete the summary below using the list of words A-l below.

Research into aspirin
Jeffreys argues that the reason why (38)……………….did not find out about new uses of aspirin is that aspirin is no longer a (39)…………………drug. He therefore suggests that there should be (40)……………….support for further research into the possible applications of the drug.

A useful
B cheap
C state
D international
E major drug companies
F profitable
G commercial
H public sector scientists
I health officials

Twist in the Tale

A Less than three years ago, doom merchants were predicting that the growth in video games and the rise of the Internet would sound the death knell for children’s literature. But contrary to popular myth, children are reading more books than ever. A recent survey by Books Marketing found that children up to the age of 11 read on average for four hours a week, particularly girls.

B Moreover, the children’s book market, which traditionally was seen as a poor cousin to the more lucrative and successful adult market, has come into its own. Publishing houses are now making considerable profits on the back of new children’s books and children’s authors can now command significant advances. ‘Children’s books are going through an incredibly fertile period,’ says Wendy Cooling, a children’s literature consultant. ‘There’s a real buzz around them. Book clubs are happening, sales are good, and people are much more willing to listen to children’s authors.’

C The main growth area has been the market for eight to fourteen-year-olds, and there is little doubt that the boom has been fuelled by the bespectacled apprentice, Harry Potter. So influential has J. K. Rowling’s series of books been that they have helped to make reading fashionable for pre-teens. ‘Harry made it OK to be seen on a bus reading a book,’ says Cooling. ‘To a child, that is important.’ The current buzz around the publication of the fourth Harry Potter beats anything in the world of adult literature.

D ‘People still tell me, “Children don’t read nowadays”,’ says David Almond, the award-winning author of children’s books such as Skellig. The truth is that they are skilled, creative readers. When 1 do classroom visits, they ask me very sophisticated questions about use of language, story structure, chapters and dialogue.’ No one is denying that books are competing with other forms of entertainment for children’s attention but it seems as though children find a special kind of mental nourishment within the printed page.

E ‘A few years ago, publishers lost confidence and wanted to make books more like television, the medium that frightened them most,’ says children’s book critic Julia Eccleshare. ‘But books aren’t TV, and you will find that children always say that the good thing about books is that you can see them in your head. Children are demanding readers,’ she says. ‘If they don’t get it in two pages, they’ll drop it.’

F No more are children’s authors considered mere sentimentalists or failed adult writers. ‘Some feted adult writers would kill for the sales,’ says Almond, who sold 42,392 copies of Skellig in 1999 alone. And advances seem to be growing too: UK publishing outfit Orion recently negotiated a six-figure sum from US company Scholastic for The Seeing Stone, a children’s novel by Kevin Crossley-Holland, the majority of which will go to the author.

G It helps that once smitten, children are loyal and even fanatical consumers. Author Jacqueline Wilson says that children spread news of her books like a bushfire. ‘My average reader is a girl of ten,’ she explains. ‘They’re sociable and acquisitive. They collect. They have parties – where books are a good present. If they like something, they have to pass it on.’ After Rowling, Wilson is currently the best-selling children’s writer, and her sales have boomed over the past three years. She has sold more than three million books, but remains virtually invisible to adults, although most ten- year-old girls know about her.

H Children’s books are surprisingly relevant to contemporary life. Provided they are handled with care, few topics are considered off-limits for children. One senses that children’s writers relish the chance to discuss the whole area of topics and language. But Anne Fine, author of many award ­winning children’s books is concerned that the British literati still ignore children’s culture. ‘It’s considered worthy but boring,’ she says.

I T think there’s still a way to go,’ says Almond, who wishes that children’s books were taken more seriously as literature. Nonetheless, he derives great satisfaction from his child readers. ‘They have a powerful literary culture,’ he says. ‘It feels as if you’re able to step into the store of mythology and ancient stories that run through all societies and encounter the great themes: love and loss and death and redemption.’

J At the moment, the race is on to find the next Harry Potter. The bidding for new books at Bologna this year – the children’s equivalent of the Frankfurt Book Fair – was as fierce as anything anyone has ever seen. All of which bodes well for the long-term future of the market – and for children’s authors, who have traditionally suffered the lowest profile in literature, despite the responsibility of their role.

Questions 1-7
Look at the following list of people A-E and the list of statements (Questions 1-7). Match each statement with one of the people listed.

A Wendy Cooling
B David Almond
C Julia Eccleshare
D Jacqueline Wilson
E Anne Fine

1. Children take pleasure in giving books to each other.
2. Reading in public is an activity that children have not always felt comfortable about doing.
3. Some well-known writers of adult literature regret that they earn less than popular children’s writers.
4. Children are quick to decide whether they like or dislike a book.
5. Children will read many books by an author that they like.
6. The public do not realise how much children read today.
7. We are experiencing a rise in the popularity of children’s literature.

Questions 8-10
Using NO MORE THAN THREE WORDS taken from the reading passage, answer the following questions.

8. For which age group have sales of books risen the most?
9. Which company has just invested heavily in an unpublished children’s book?
10. Who is currently the best-selling children’s writer?

Questions 11-14
Reading Passage 1 has ten paragraphs A-J. Which paragraph mentions the following (Questions 11-14)?

11. the fact that children are able to identify and discuss the important elements of fiction
12. the undervaluing of children’s society
13. the impact of a particular fictional character on the sales of children’s books
14. an inaccurate forecast regarding the reading habits of children

Fun for the Masses

A Are you better off than you used to be? Even after six years of sustained economic growth, Americans worry about that question. Economists who plumb government income statistics agree that Americans’ incomes, as measured in inflation-adjusted dollars, have risen more slowly in the past two decades than in earlier times, and that some workers’ real incomes have actually fallen. They also agree that by almost any measure, income is distributed less equally than it used to be. Neither of those claims, however, sheds much light on whether living standards are rising or falling. This is because ‘living standard’ is a highly amorphous concept. Measuring how much people earn is relatively easy, at least compared with measuring how well they live.

B A recent paper by Dora Costa, an economist at the Massachusetts Institute of Technology, looks at the living-standards debate from an unusual direction. Rather than worrying about cash incomes, Ms Costa investigates Americans’ recreational habits over the past century. She finds that people of all income levels have steadily increased the amount of time and money they devote to having fun. The distribution of dollar incomes may have become more skewed in recent years, but leisure is more evenly spread than ever.

C Ms Costa bases her research on consumption surveys dating back as far as 1888. The industrial workers surveyed in that year spent, on average, three-quarters of their incomes on food, shelter and clothing. Less than 2% of the average family’s income was spent on leisure but that average hid large disparities. The share of a family’s budget that was spent on having fun rose sharply with its income: the lowest-income families in this working-class sample spent barely 1% of their budgets on recreation, while higher earners spent more than 3%. Only the latter group could afford such extravagances as theatre and concert performances, which were relatively much more expensive than they are today.

D Since those days, leisure has steadily become less of a luxury. By 1991, the average household needed to devote only 38% of its income to the basic necessities, and was able to spend 6% on recreation. Moreover, Ms Costa finds that the share of the family budget spent on leisure now rises much less sharply with income than it used to. At the beginning of this century a family’s recreational spending tended to rise by 20% for every 10% rise in income. By 1972-73, a 10% income gain led to roughly a 15% rise in recreational spending, and the increase fell to only 13% in 1991. What this implies is that Americans of all income levels are now able to spend much more of their money on having fun.

E One obvious cause is that real income overall has risen. If Americans in general are richer, their consumption of entertainment goods is less likely to be affected by changes in their income. But Ms Costa reckons that rising incomes are responsible for, at most, half of the changing structure of leisure spending. Much of the rest may be due to the fact that poorer Americans have more time off than they used to. In earlier years, low-wage workers faced extremely long hours and enjoyed few days off. But since the 1940s, the less skilled (and lower paid) have worked ever-fewer hours, giving them more time to enjoy leisure pursuits.

F Conveniently, Americans have had an increasing number of recreational possibilities to choose from. Public investment in sports complexes, parks and golf courses has made leisure cheaper and more accessible. So too has technological innovation. Where listening to music used to imply paying for concert tickets or owning a piano, the invention of the radio made music accessible to everyone and virtually free. Compact discs, videos and other paraphernalia have widened the choice even further.

G At a time when many economists are pointing accusing fingers at technology for causing a widening inequality in the wages of skilled and unskilled workers, Ms Costa’s research gives it a much more egalitarian face. High earners have always been able to afford amusement. By lowering the price of entertainment, technology has improved the standard of living of those in the lower end of the income distribution. The implication of her results is that once recreation is taken into account, the differences in Americans’ living standards may not have widened so much after all.

H These findings are not water-tight. Ms Costa’s results depend heavily upon what exactly is classed as a recreational expenditure. Reading is an example. This was the most popular leisure activity for working men in 1888, accounting for one-quarter of all recreational spending. In 1991, reading took only 16% of the entertainment dollar. But the American Department of Labour’s expenditure surveys do not distinguish between the purchase of a mathematics tome and that of a best-selling novel. Both are classified as recreational expenses. If more money is being spent on textbooks and professional books now than in earlier years, this could make ‘recreational’ spending appear stronger than it really is.

I Although Ms Costa tries to address this problem by showing that her results still hold even when tricky categories, such as books, are removed from the sample, the difficulty is not entirely eliminated. Nonetheless, her broad conclusion seems fair. Recreation is more available to all and less dependent on income. On this measure at least, inequality of living standards has fallen.

Questions 15-21
Reading Passage 2 has nine paragraphs A-I. From the list of headings below choose the most suitable heading for each paragraph. Write the appropriate numbers (i-xi) in boxes 15-21 on your answer sheet.

15. Paragraph A
16. Paragraph B
17. Paragraph C
18. Paragraph D
19. Paragraph F
20. Paragraph G
21. Paragraph H

List of Headings
i Wide differences in leisure activities according to income
ii Possible inconsistencies in Ms Costa’s data
iii More personal income and time influence leisure activities
iv Investigating the lifestyle problem from a new angle
v Increased incomes fail to benefit everyone
vi A controversial development offers cheaper leisure activities
vii Technology heightens differences in living standards
viii The gap between income and leisure spending closes
ix Two factors have led to a broader range of options for all
x Have people’s lifestyles improved?
xi High earners spend less on leisure

Questions 22-26
Complete each of the following statements (Questions 22-26) using words from the box.

List of words
holiday time
recreational activities
income levels
non-luxury spending
computer technology
cash incomes

It is easier to determine (22)……………………….than living standards.

A decrease in (23)………………………during the 20th century led to a bigger investment in leisure.

According to Ms Costa, how much Americans spend on leisure has been directly affected by salaries and (24)………………..

The writer notes both positive and negative influences of (25)…………………….

According to the writer, the way Ms Costa defined (26)……………………..may have been misleading.

Question 27
Choose the appropriate letter A-D and write it in box 27 on your answer sheet.

27. The writer thinks that Ms Costa
A provides strong evidence to support her theory.
B displays serious flaws in her research methods.
C attempts to answer too many questions.
D has a useful overall point to make

THE ART OF HEALING

As with so much, the medicine of the Tang dynasty left its European counterpart in the shade. It boasted its own ‘national health service’, and left behind the teachings of the incomparable Sun Simiao.

If no further evidence was available of the sophistication of China in the Tang era, then a look at Chinese medicine would be sufficient. At the Western end of the Eurasian continent the Roman empire had vanished, and there was nowhere new to claim the status of the cultural and political centre of the world. In fact, for a few centuries, this centre happened to be the capital of the Tang empire, and Chinese medicine under the Tang was far ahead of its European counterpart. The organisational context of health and healing was structured to a degree that had no precedence in Chinese history and found no parallel elsewhere.

An Imperial Medical Office had been inherited from previous dynasties: it was immediately restructured and staffed with directors and deputy directors, chief and assistant medical directors, pharmacists and curators of medicinal herb gardens and further personnel. Within the first two decades after consolidating its rule, the Tang administration set up one central and several provincial medical colleges with professors, lecturers, clinical practitioners and pharmacists to train students in one or all of the four departments of medicine, acupuncture, physical therapy and exorcism.

Physicians were given positions in governmental medical service only after passing qualifying examinations. They were remunerated in accordance with the number of cures they had effected during the past year.

In 723 Emperor Xuanzong personally composed a general formulary of prescriptions recommended to him by one of his imperial pharmacists and sent it to all the provincial medical schools. An Arabic traveller, who visited China in 851, noted with surprise that prescriptions from the emperor’s formulary were publicised on notice boards at crossroads to enhance the welfare of the population.

The government took care to protect the general populace from potentially harmful medical practice. The Tang legal code was the first in China to include laws concerned with harmful and heterodox medical practices. For example, to treat patients for money without adhering to standard procedures was defined as fraud combined with theft and had to be tried in accordance with the legal statutes on theft. If such therapies resulted in the death of a patient, the healer was to be banished for two and a half years. In case a physician purposely failed to practice according to the standards, he was to be tried in accordance with the statutes on premeditated homicide. Even if no harm resulted, he was to be sentenced to sixty strokes with a heavy cane.

In fact, physicians practising during the Tang era had access to a wealth of pharmaceutical and medical texts, their contents ranging from purely pragmatic advice to highly sophisticated theoretical considerations. Concise descriptions of the position, morphology, and functions of the organs of the human body stood side by side in libraries with books enabling readers to calculate the daily, seasonal and annual climatic conditions of cycles of sixty years and to understand and predict their effects on health.

Several Tang authors wrote large collections of prescriptions, continuing a literary tradition documented since the 2nd century BC. The two most outstanding works to be named here were those by Sun Simiao (581-682?) and Wang Tao (c.670-755). The latter was a librarian who copied more than six thousand formulas, categorised in 1,104 sections, from sixty-five older works and published them under the title Wciitai miyao. Twenty-four sections, for example, were devoted to ophthalmology. They reflect the Indian origin of much Chinese knowledge on ailments of the eye and, in particular, of cataract surgery.

Sun Simiao was the most eminent physician and author not only of the Tang dynasty, but of the entire first millennium AD. He was a broadly educated intellectual and physician; his world view integrated notions of all three of the major currents competing at his time – Confucianism, Daoism and Buddhism. Sun Simiao gained fame during his lifetime as a clinician (he was summoned to the imperial court at least once) and as author of the Prescriptions Worth Thousands in Gold (Qianjinfang) and its sequel. In contrast to developments in the 12th century, physicians relied on prescriptions and single substances to treat their patients’ illnesses. The theories of systematic correspondences, characteristic of the acupuncture tradition, had not been extended to cover pharmacology yet.

Sun Simiao rose to the pantheon of Chinese popular Buddhism in about the 13th century. He was revered as paramount Medicine God. He gained this extraordinary position in Chinese collective memory not only because he was an outstanding clinician and writer, but also for his ethical concerns. Sun Simiao was the first Chinese author known to compose an elaborate medical ethical code. Even though based on Buddhist and Confucian values, his deontology is comparable to the Hippocratic Oath. It initiated a debate on the task of medicine, its professional obligations, social position and moral justification that continued until the arrival of Western medicine in the 19th century.

Despite or – more likely – because of its long- lasting affluence and political stability, the Tang dynasty did not add any significantly new ideas to the interpretation of illness, health and healing. Medical thought reflects human anxieties; changes in medical thought always occur in the context of new existential fears or of fundamentally changed social circumstances. Nevertheless, medicine was a most fascinating ingredient of Tang civilisation and it left a rich legacy to subsequent centuries.

Questions 28-30
Choose the appropriate letters A-D and write them in boxes 28-30 on your answer sheet.

28. In the first paragraph, the writer draws particular attention to
A the lack of medical knowledge in China prior to the Tang era.
B the Western interest in Chinese medicine during the Tang era.
C the systematic approach taken to medical issues during the Tang era.
D the rivalry between Chinese and Western cultures during the Tang era.

29. During the Tang era, a government doctor’s annual salary depended upon
A the effectiveness of his treatment.
B the extent of his medical experience.
C the number of people he had successfully trained.
D the breadth of his medical expertise.

30. Which of the following contravened the law during the Tang era?
A a qualified doctor’s refusal to practise
B the use of unorthodox medical practices
C patient dying under medical treatment
D the receipt of money for medical treatment

Questions 31-37
Do the following statements agree with the information given in Reading Passage 3? In boxes 31-37 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

31. Academic staff sometimes taught a range of medical subjects during the Tang era.
32. The medical knowledge available during the Tang era only benefited the wealthy.
33. Tang citizens were encouraged to lead a healthy lifestyle.
34. Doctors who behaved in a fraudulent manner were treated in the same way as ordinary criminals during the Tang era.
35. Medical reference books published during the Tang era covered practical and academic issues.
36. Waitai miyao contained medical data from the Tang era.
37. Chinese medical authors are known to have influenced Indian writing.

Questions 38-40
Complete the sentences below with words taken from Reading Passage 3. Use NO MORE THAN THREE WORDS for each answer.

The first known medical writing in China dates back to the (38)………………………

During the Tang era, doctors depended most on (39)……………………and single substances to treat their patients.

(40)………………………..is famous for producing a set of medical rules for Chinese physician

The Great Australian Fence

A war has been going on for almost a hundred years between the sheep farmers of Australia and the dingo, Australia’s wild dog. To protect their livelihood, the farmers built a wire fence, 3,307 miles of continuous wire mesh, reaching from the coast of South Australia all the way to the cotton fields of eastern Queensland, just short of the Pacific Ocean.

The Fence is Australia’s version of the Great Wall of China, but even longer, erected to keep out hostile invaders, in this case hordes of yellow dogs. The empire it preserves is that of the woolgrowers, sovereigns of the world’s second largest sheep flock, after China’s – some 123 million head – and keepers of a wool export business worth four billion dollars. Never mind that more and more people – conservationists, politicians, taxpayers and animal lovers – say that such a barrier would never be allowed today on ecological grounds. With sections of it almost a hundred years old, the dog fence has become, as conservationist Lindsay Fairweather ruefully admits, ‘an icon of Australian frontier ingenuity’.

To appreciate this unusual outback monument and to meet the people whose livelihoods depend on it, I spent part of an Australian autumn travelling the wire. It’s known by different names in different states: the Dog Fence in South Australia, the Border Fence in New South Wales and the Barrier Fence in Queensland. I would call it simply the Fence.

For most of its prodigious length, this epic fence winds like a river across a landscape that, unless a big rain has fallen, scarcely has rivers. The eccentric route, prescribed mostly by property lines, provides a sampler of outback topography: the Fence goes over sand dunes, past salt lakes, up and down rock-strewn hills, through dense scrub and across barren plains.

The Fence stays away from towns. Where it passes near a town, it has actually become a tourist attraction visited on bus tours. It marks the traditional dividing line between cattle and sheep. Inside, where the dingoes are legally classified as vermin, they are shot, poisoned and trapped. Sheep and dingoes do not mix and the Fence sends that message mile after mile.

What is this creature that by itself threatens an entire industry, inflicting several millions of dollars of damage a year despite the presence of the world’s most obsessive fence? Cousin to the coyote and the jackal, descended from the Asian wolf, Cam’s lupus dingo is an introduced species of wild dog. Skeletal remains indicate that the dingo was introduced to Australia more than 3,500 years ago probably with Asian seafarers who landed on the north coast. The adaptable dingo spread rapidly and in a short time became the top predator, killing off all its marsupial competitors. The dingo looks like a small wolf with a long nose, short pointed ears and a bushy tail. Dingoes rarely bark; they yelp and howl. Standing about 22 inches at the shoulder – slightly taller than a coyote – the dingo is Australia’s largest land carnivore.

The woolgrowers’ war against dingoes, which is similar to the sheep ranchers’ rage against coyotes in the US, started not long after the first European settlers disembarked in 1788, bringing with them a cargo of sheep. Dingoes officially became outlaws in 1830 when governments placed a bounty on their heads. Today bounties for problem dogs killing sheep inside the Fence can reach $500. As pioneers penetrated the interior with their flocks of sheep, fences replaced shepherds until, by the end of the 19th century, thousands of miles of barrier fencing crisscrossed the vast grazing lands.

The dingo started out as a quiet observer,’ writes Roland Breckwoldt, in A Very Elegant Animal: The Dingo, ‘but soon came to represent everything that was dark and dangerous on the continent.’ It is estimated that since sheep arrived in Australia, dingo numbers have increased a hundredfold. Though dingoes have been eradicated from parts of Australia, an educated guess puts the population at more than a million.

Eventually government officials and graziers agreed that one well-maintained fence, placed on the outer rim of sheep country and paid for by taxes levied on woolgrowers, should supplant the maze of private netting. By 1960, three states joined their barriers to form a single dog fence.

The intense private battles between woolgrowers and dingoes have usually served to define the Fence only in economic terms. It marks the difference between profit and loss. Yet the Fence casts a much broader ecological shadow for it has become a kind of terrestrial dam, deflecting the flow of animals inside and out. The ecological side effects appear most vividly at Sturt National Park. In 1845, explorer Charles Sturt led an expedition through these parts on a futile search for an inland sea. For Sturt and other early explorers, it was a rare event to see a kangaroo. Now they are ubiquitous for without a native predator the kangaroo population has exploded inside the Fence. Kangaroos are now cursed more than dingoes. They have become the rivals of sheep, competing for water and grass. In response state governments cull* more than three million kangaroos a year to keep Australia’s national symbol from overrunning the pastoral lands. Park officials, who recognise that the fence is to blame, respond to the excess of kangaroos by saying The fence is there, and we have to live with it.

Questions 1-4
Choose the appropriate letters A-D and write them in boxes 1-4 on your answer sheet.

1. Why was the fence built?
A to separate the sheep from the cattle
B to stop the dingoes from being slaughtered by farmers
C to act as a boundary between properties
D to protect the Australian wool industry

2. On what point do the conservationists and politicians agree?
A Wool exports are vital to the economy.
B The fence poses a threat to the environment.
C The fence acts as a useful frontier between states.
D The number of dogs needs to be reduced.

3. Why did the author visit Australia?
A to study Australian farming methods
B to investigate how the fence was constructed
C because he was interested in life around the fence
D because he wanted to learn more about the wool industry

4. How does the author feel about the fence?
A impressed
B delighted
C shocked
D annoyed

Questions 5-11
Do the following statements agree with the information given in Reading Passage 1? In boxes 5-11 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

5. The fence serves a different purpose in each state.
6. The fence is only partially successful.
7. The dingo is indigenous to Australia.
8. Dingoes have flourished as a result of the sheep industry.
9. Dingoes are known to attack humans.
10. Kangaroos have increased in number because of the fence.
11. The author does not agree with the culling of kangaroos.

Questions 12-13
Choose the appropriate letters A-D and write them in boxes 12-13 on your answer sheet.

12. When did the authorities first acknowledge the dingo problem?
A 1788
B 1830
C 1845
D 1960

13. How do the park officials feel about the fence?
A philosophical
B angry
C pleased
D proud

IT’S ECO-LOGICAL

If there were awards for tourism phrases that have been hijacked, diluted and misused then ‘ecotourism’ would earn top prize. The term first surfaced in the early 1980s reflecting a surge in environmental awareness and a realisation by tour operators that many travellers wanted to believe their presence abroad would not have a negative impact. It rapidly became the hottest marketing tag a holiday could carry.

These days the ecotourism label is used to cover anything from a two-week tour living with remote Indonesian tribes, to a one-hour motorboat trip through an Australian gorge. In fact, any tour that involves cultural interaction, natural beauty spots, wildlife or a dash of soft adventure is likely to be included in the overflowing ecotourism folder. There is no doubt the original motives behind the movement were honourable attempts to provide a way for those who cared to make informed choices, but the lack of regulations and a standard industry definition left many travellers lost in an ecotourism jungle.

It is easier to understand why the ecotourism market has become so overcrowded when we look at its wider role in the world economy. According to World Tourism Organisation figures, ecotourism is worth US$20 billion a year and makes up one-fifth of all international tourism. Add to this an annual growth rate of around five per cent and the pressure for many operators, both in developed and developing countries, to jump on the accelerating bandwagon is compelling. Without any widely recognised accreditation system, the consumer has been left to investigate the credentials of an operator themselves. This is a time-consuming process and many travellers usually take an operator’s claims at face value, only adding to the proliferation of fake ecotours.

However, there are several simple questions that will provide qualifying evidence of a company’s commitment to minimise its impact on the environment and maximise the benefits to the tourism area’s local community. For example, does the company use recycled or sustainable, locally harvested materials to build its tourist properties? Do they pay fair wages to all employees? Do they offer training to employees? It is common for city entrepreneurs to own tour companies in country areas, which can mean the money you pay ends up in the city rather than in the community being visited. By taking a little extra time to investigate the ecotourism options, it is not only possible to guide your custom to worthy operators but you will often find that the experience they offer is far more rewarding.

The ecotourism business is still very much in need of a shake-up and a standardised approach. There are a few organisations that have sprung up in the last ten years or so that endeavour to educate travellers and operators about the benefits of responsible ecotourism. Founded in 1990, the Ecotourism Society (TES) is a non-profit organisation of travel industry, conservation and ecological professionals, which aims to make ecotourism a genuine tool for conservation and sustainable development. Helping to create inherent economic value in wilderness environments and threatened cultures has undoubtedly been one of the ecotourism movement’s most notable achievements. TES organises an annual initiative to further aid development of the ecotourism industry. This year it is launching ‘Your Travel Choice Makes a Difference’, an educational campaign aimed at helping consumers understand the potential positive and negative impacts of their travel decisions. TES also offers guidance on the choice of ecotour and has established a register of approved ecotourism operators around the world.

A leading ecotourism operator in the United Kingdom is Tribes, which won the 1999 Tourism Concern and Independent Traveller’s World ‘Award for Most Responsible Tour Operator’. Amanda Marks, owner and director of Tribes, believes that the ecotourism industry still has some way to go to get its house in order. Until now, no ecotourism accreditation scheme has really worked, principally because there has been no systematic way of checking that accredited companies actually comply with the code of practice. Amanda believes that the most promising system is the recently re-launched Green Globe 21 scheme. The Green Globe 21 award is based on the sustainable development standards contained in Agenda 21 from the 1992 Earth Summit and was originally coordinated by the World Travel & Tourism Council (WTTC). The scheme is now an independent concern, though the WTTC still supports it. Until recently, tour companies became affiliates and could use the Green Globe logo merely on payment of an annual fee, hardly a suitable qualifying standard. However, in November 1999 Green Globe 21 introduced an annual, independent check on operators wishing to use the logo.

Miriam Cain, from the Green Globe 21 marketing development, explains that current and new affiliates will now have one year to ensure that their operations comply with Agenda 21 standards. If they fail the first inspection, they can only reapply once. The inspection process is not a cheap option, especially for large companies, but the benefits of having Green Globe status and the potential operational cost savings that complying with the standards can bring should be significant. ‘We have joint ventures with organisations around the world, including Australia and the Caribbean, that will allow us to effectively check all affiliate operators,’ says Miriam. The scheme also allows destination communities to become Green Globe 21 approved.

For a relatively new industry it is not surprising that ecotourism has undergone teething pains. However, there are signs that things are changing for the better. With a committed and unified approach by the travel industry, local communities, travellers and environmental experts could make ecotourism a tag to be proud of and trusted.

Questions 14-19
Do the following statements agree with the views of the writer in Reading Passage 2? In boxes 14-19 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

14. The term ‘ecotourism’ has become an advertising gimmick.
15. The intentions of those who coined the term ‘ecotourism’ were sincere.
16. Ecotourism is growing at a faster rate than any other type of travel.
17. It is surprising that so many tour organisations decided to become involved in ecotourism.
18. Tourists have learnt to make investigations about tour operators before using them.
19. Tourists have had bad experiences on ecotour holidays.

Questions 20-22
According to the information given in the reading passage, which THREE of the following are true of the Ecotourism Society (TES)?

A it has monitored the growth in ecotourism
B it involves a range of specialists in the field
C it has received public recognition for the role it performs
D it sets up regular ecotour promotions
E it offers information on ecotours at an international level
F it consults with people working in tourist destinations

Questions 23-24
According to the information given in the reading passage, which TWO of the following are true of the Green Globe 21 award?

A the scheme is self regulating
B Amanda Marks was recruited to develop the award
C prior to 1999 companies were not required to pay for membership
D both tour operators and tour sites can apply for affiliation
E it intends to reduce the number of ecotour operators

Questions 25-27
Using NO MORE THAN THREE WORDS, answer the following questions.

25. Which body provides information on global tourist numbers?
26. Who often gains financially from tourism in rural environments?
27. Which meeting provided the principles behind the Green Globe 21 regulations?

Striking the right note

The uncanny, if sometimes distracting, ability to name a solitary note out of the blue, without any other notes for reference, is a prized musical talent – and a scientific mystery. Musicians with perfect pitch – or, as many researchers prefer to call it, absolute pitch – can often play pieces by ear, and many can transcribe music brilliantly. That’s because they perceive the position of a note in the musical stave – its pitch – as clearly as the fact that they heard it. Hearing and naming the pitch go hand in hand.

By contrast, most musicians follow not the notes, but the relationship between them. They may easily recognise two notes as being a certain number of tones apart, but could name the higher note as an E only if they are told the lower one is a C, for example. This is relative pitch. Useful, but much less mysterious.

For centuries, absolute pitch has been thought of as the preserve of the musical elite. Some estimates suggest that maybe fewer than 1 in 2,000 people possess it. But a growing number of studies, from speech experiments to brain scans, are now suggesting that a knack for absolute pitch may be far more common, and more varied, than previously thought. ‘Absolute pitch is not an all or nothing feature,’ says Marvin, a music theorist at the University of Rochester in New York state. Some researchers even claim that we could all develop the skill, regardless of our musical talent. And their work may finally settle a decades-old debate about whether absolute pitch depends on melodious genes – or early music lessons.

Music psychologist Diana Deutsch at the University of California in San Diego is the leading voice. Last month at the Acoustical Society of America meeting in Columbus, Ohio, Deutsch reported a study that suggests we all have the potential to acquire absolute pitch – and that speakers of tone languages use it every day. A third of the world’s population – chiefly people in Asia and Africa – speak tone languages, in which a word’s meaning can vary depending on the pitch a speaker uses.

Deutsch and her colleagues asked seven native Vietnamese speakers and 15 native Mandarin speakers to read out lists of words on different days. The chosen words spanned a range of pitches, to force the speakers to raise and lower their voices considerably. By recording these recited lists and taking the average pitch for each whole word, the researchers compared the pitches used by each person to say each word on different days.

Both groups showed strikingly consistent pitch for any given word – often less than a quarter-tone difference between days. ‘The similarity,’ Deutsch says, ‘is mind-boggling.’ It’s also, she says, a real example of absolute pitch. As babies, the speakers learnt to associate certain pitches with meaningful words – just as a musician labels one tone A and another B – and they demonstrate this precise use of pitch regardless of whether or not they have had any musical training, she adds.

Deutsch isn’t the only researcher turning up everyday evidence of absolute pitch. At least three other experiments have found that people can launch into familiar songs at or very near the correct pitches. Some researchers have nicknamed this ability ‘absolute memory’, and they say it pops up on other senses, too. Given studies like these, the real mystery is why we don’t all have absolute pitch, says cognitive psychologist Daniel Levitin of McGill University in Montreal.

Over the past decade, researchers have confirmed that absolute pitch often runs in families. Nelson Freimer of the University of California in San Francisco, for example, is just completing a study that he says strongly suggests the right genes help create this brand of musical genius. Freimer gave tone tests to people with absolute pitch and to their relatives. He also tested several hundred other people who had taken early music lessons. He found that relatives of people with absolute pitch were far more likely to develop the skill than people who simply had the music lessons. There is clearly a familial aggregation of absolute pitch,’ Freimer says.

Freimer says some children are probably genetically predisposed toward absolute pitch – and this innate inclination blossoms during childhood music lessons. Indeed, many researchers now point to this harmony of nature and nurture to explain why musicians with absolute pitch show different levels of the talent.

Indeed, researchers are finding more and more evidence suggesting music lessons are critical to the development of absolute pitch. In a survey of 2,700 students in American music conservatories and college programmes, New York University geneticist Peter Gregersen and his colleagues found that a whopping 32 per cent of the Asian students reported having absolute pitch, compared with just 7 per cent of non-Asian students. While that might suggest a genetic tendency towards absolute pitch in the Asian population, Gregersen says that the type and timing of music lessons probably explains much of the difference.

For one thing, those with absolute pitch started lessons, on average, when they were five years old, while those without absolute pitch started around the age of eight. Moreover, adds Gregersen, the type of music lessons favoured in Asia, and by many of the Asian families in his study, such as the Suzuki method, often focus on playing by ear and learning the names of musical notes, while those more commonly used in the US tend to emphasise learning scales in a relative pitch way. In Japanese pre-school music programmes, he says, children often have to listen to notes played on a piano and hold up a coloured flag to signal the pitch. ‘There’s a distinct cultural difference,’ he says.

Deutsch predicts that further studies will reveal absolute pitch – in its imperfect, latent form – inside all of us. The Western emphasis on relative pitch simply obscures it, she contends. ‘It’s very likely that scientists will end up concluding that we’re all born with the potential to acquire very fine-grained absolute pitch. It’s really just a matter of life getting in the way.’

Questions 28-35
Complete the notes below using words from the box. Write your answers in boxes 28-35 on your answer sheet.

NOTES

Research is being conducted into the mysterious musical (28)……………….some people possess known as perfect pitch. Musicians with this talent are able to name and sing a (29)……………….without reference to another and it is this that separates them from the majority who have only (30)………………….pitch. The research aims to find out whether this skill is the product of genetic inheritance or early exposure to (31)…………………or, as some researchers believe, a combination of both. One research team sought a link between perfect pitch and (32)…………………..languages in order to explain the high number of Asian speakers with perfect pitch. Speakers of Vietnamese and Mandarin were asked to recite (33)……………………on different occasions and the results were then compared in terms of (34)………………………A separate study found that the approach to teaching music in many Asian (35)…………………….
emphasised playing by ear whereas the US method was based on the relative pitch approach.

List of words
ability
music lessons
pitch
words
tone
relative
cultures
note

Questions 36-40
Reading Passage 3 contains a number of opinions provided by five different scientists. Match each opinion (Questions 36-40) with one of the scientists (A-E).

A Levitin
B Deutsch
C Gregersen
D Marvin
E Freimer

You may use any of the people A-E more than once.

36. Absolute pitch is not a clear-cut issue.
37. Anyone can learn how to acquire perfect pitch.
38. It’s actually surprising that not everyone has absolute pitch.
39. The perfect pitch ability is genetic.
40. The important thing is the age at which music lessons are started.

Indoor Pollution

Since the early eighties we have been only too aware of the devastating effects of large-scale environmental pollution. Such pollution is generally the result of poor government planning in many developing nations or the short-sighted, selfish policies of the already industrialised countries which encourage a minority of the world’s population to squander the majority of its natural resources.

While events such as the deforestation of the Amazon jungle or the nuclear disaster in Chernobyl continue to receive high media exposure, as do acts of environmental sabotage, it must be remembered that not all pollution is on this grand scale. A large proportion of the world’s pollution has its source much closer to home. The recent spillage of crude oil from an oil tanker accidentally discharging its cargo straight into Sydney Harbour not only caused serious damage to the harbour foreshores but also created severely toxic fumes which hung over the suburbs for days and left the angry residents wondering how such a disaster could have been allowed to happen.

Avoiding pollution can be a full­time job. Try not to inhale traffic fumes; keep away from chemical plants and building-sites; wear a mask when cycling. It is enough to make you want to stay at home. But that, according to a growing body of scientific evidence, would also be a bad idea. Research shows that levels of pollutants such as hazardous gases, particulate matter and other chemical ‘nasties’ are usually higher indoors than out, even in the most polluted cities. Since the average American spends 18 hours indoors for every hour outside, it looks as though many environmentalists may be attacking the wrong target.

The latest study, conducted by two environmental engineers, Richard Corsi and Cynthia Howard-Reed, of the University of Texas in Austin, and published in Environmental Science and Technology, suggests that it is the process of keeping clean that may be making indoor pollution worse. The researchers found that baths, showers, dishwashers and washing machines can all be significant sources of indoor pollution, because they extract trace amounts of chemicals from the water that they use and transfer them to the air.

Nearly all public water supplies contain very low concentrations of toxic chemicals, most of them left over from the otherwise beneficial process of chlorination. Dr. Corsi wondered whether they stay there when water is used, or whether they end up in the air that people breathe. The team conducted a series of experiments in which known quantities of five such chemicals were mixed with water and passed through a dishwasher, a washing machine, a shower head inside a shower stall or a tap in a bath, all inside a specially designed chamber. The levels of chemicals in the effluent water and in the air extracted from the chamber were then measured to see how much of each chemical had been transferred from the water into the air.

The degree to which the most volatile elements could be removed from the water, a process known as chemical stripping, depended on a wide range of factors, including the volatility of the chemical, the temperature of the water and the surface area available for transfer. Dishwashers were found to be particularly effective: the high-temperature spray, splashing against the crockery and cutlery, results in a nasty plume of toxic chemicals that escapes when the door is opened at the end of the cycle.

In fact, in many cases, the degree of exposure to toxic chemicals in tap water by inhalation is comparable to the exposure that would result from drinking the stuff. This is significant because many people are so concerned about water-borne pollutants that they drink only bottled water, worldwide sales of which are forecast to reach $72 billion by next year. D. Corsi’s results suggest that they are being exposed to such pollutants anyway simply by breathing at home.

The aim of such research is not, however, to encourage the use of gas masks when unloading the washing. Instead, it is to bring a sense of perspective to the debate about pollution. According to Dr Corsi, disproportionate effort is wasted campaigning against certain forms of outdoor pollution, when there is as much or more cause for concern indoors, right under people’s noses. Using gas cookers or burning candles, for example, both result in indoor levels of carbon monoxide and particulate matter that are just as high as those to be found outside, amid heavy traffic. Overcrowded classrooms whose ventilation systems were designed for smaller numbers of children frequently contain levels of carbon dioxide that would be regarded as unacceptable on board a submarine. ‘New car smell’ is the result of high levels of toxic chemicals, not cleanliness. Laser printers, computers, carpets and paints all contribute to the noxious indoor mix.

The implications of indoor pollution for health are unclear. But before worrying about the problems caused by large-scale industry, it makes sense to consider the small-scale pollution at home and welcome international debate about this. Scientists investigating indoor pollution will gather next month in Edinburgh at the Indoor Air conference to discuss the problem. Perhaps unwisely, the meeting is being held indoors.

Questions 1-6
Choose the appropriate letters A-D and write them in boxes 1-6 on your answer sheet.

1. In the first paragraph, the writer argues that pollution
A has increased since the eighties.
B is at its worst in industrialised countries.
C results from poor relations between nations.
D is caused by human self-interest.

2. The Sydney Harbour oil spill was the result of a
A ship refuelling in the harbour.
B tanker pumping oil into the sea.
C collision between two oil tankers.
D deliberate act of sabotage.

3. In the 3rd paragraph the writer suggests that
A people should avoid working in cities.
B Americans spend too little time outdoors.
C hazardous gases are concentrated in industrial suburbs.
D there are several ways to avoid city pollution.

4. The Corsi research team hypothesised that
A toxic chemicals can pass from air to water.
B pollution is caused by dishwashers and baths.
C city water contains insufficient chlorine.
D household appliances are poorly designed

5. As a result of their experiments, Dr Corsi’s team found that
A dishwashers are very efficient machines.
B tap water is as polluted as bottled water.
C indoor pollution rivals outdoor pollution.
D gas masks are a useful protective device.

6. Regarding the dangers of pollution, the writer believes that
A there is a need for rational discussion.
B indoor pollution is a recent phenomenon.
C people should worry most about their work environment.
D industrial pollution causes specific diseases.

Questions 7-13
Reading Passage 1 describes a number of cause and effect relationships. Match each Cause (Questions 7-13) in List A with its Effect (A-J) in List B.

List A: CAUSES

7. Industrialised nations use a lot of energy.
8. Oil spills into the sea.
9. The researchers publish their findings.
10. Water is brought to a high temperature.
11. People fear pollutants in tap water.
12. Air conditioning systems are inadequate.
13. Toxic chemicals are abundant in new cars.

List B: EFFECTS

A The focus of pollution moves to the home.
B The levels of carbon monoxide rise.
C The world’s natural resources are unequally shared.
D People demand an explanation.
E Environmentalists look elsewhere for an explanation.
F Chemicals are effectively stripped from the water.
G A clean odour is produced.
H Sales of bottled water increase.
I The levels of carbon dioxide rise.
J The chlorine content of drinking water increased

ROBOTS

Since the dawn of human ingenuity, people have devised ever more cunning tools to cope with work that is dangerous, boring, onerous, or just plain nasty. That compulsion has culminated in robotics – the science of conferring various human capabilities on machines.

A The modern world is increasingly populated by quasi-intelligent gizmos whose presence we barely notice but whose creeping ubiquity has removed much human drudgery. Our factories hum to the rhythm of robot assembly arms. Our banking is done at automated teller terminals that thank us with rote politeness for the transaction. Our subway trains are controlled by tireless robo-drivers. Our mine shafts are dug by automated moles, and our nuclear accidents – such as those at Three Mile Island and Chernobyl – are cleaned up by robotic muckers fit to withstand radiation.

Such is the scope of uses envisioned by Karel Capek, the Czech playwright who coined the term ‘robot’ in 1920 (the word ‘robota’ means ‘forced labor’ in Czech). As progress accelerates, the experimental becomes the exploitable at record pace.

B Other innovations promise to extend the abilities of human operators. Thanks to the incessant miniaturisation of electronics and micro­mechanics, there are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy – far greater precision than highly skilled physicians can achieve with their hands alone. At the same time, techniques of long-distance control will keep people even farther from hazard. In 1994 a ten- foot-tall NASA robotic explorer called Dante, with video-camera eyes and with spiderlike legs, scrambled over the menacing rim of an Alaskan volcano while technicians 2,000 miles away in California watched the scene by satellite and controlled Dante’s descent.

C But if robots are to reach the next stage of labour-saving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves – goals that pose a formidable challenge. ‘While we know how to tell a robot to handle a specific error,’ says one expert, ‘we can’t yet give a robot enough common sense to reliably interact with a dynamic world.’ Indeed the quest for true artificial intelligence (Al) has produced very mixed results. Despite a spasm of initial optimism in the 1960s and 1970s, when it appeared that transistor circuits and microprocessors might be able to perform in the same way as the human brain by the 21st century, researchers lately have extended their forecasts by decades if not centuries.

D What they found, in attempting to model thought, is that the human brain’s roughly one hundred billion neurons are much more talented – and human perception far more complicated – than previously imagined. They have built robots that can recognise the misalignment of a machine panel by a fraction of a millimeter in a controlled factory environment. But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 per cent that is irrelevant, instantaneously focusing on the woodchuck at the side of a winding forest road or the single suspicious face in a tumultuous crowd. The most advanced computer systems on Earth can’t approach that kind of ability, and neuroscientists still don’t know quite how we do it.

E Nonetheless, as information theorists, neuroscientists, and computer experts pool their talents, they are finding ways to get some lifelike intelligence from robots. One method renounces the linear, logical structure of conventional electronic circuits in favour of the messy, ad hoc arrangement of a real brain’s neurons. These ‘neural networks’ do not have to be programmed. They can ‘teach’ themselves by a system of feedback signals that reinforce electrical pathways that produced correct responses and, conversely, wipe out connections that produced errors. Eventually the net wires itself into a system that can pronounce certain words or distinguish certain shapes.

F In other areas researchers are struggling to fashion a more natural relationship between people and robots in the expectation that some day machines will take on some tasks now done by humans in, say, nursing homes. This is particularly important in Japan, where the percentage of elderly citizens is rapidly increasing. So experiments at the Science University of Tokyo have created a ‘face robot’ – a life-size, soft plastic model of a female head with a video camera imbedded in the left eye – as a prototype. The researchers’ goal is to create robots that people feel comfortable around. They are concentrating on the face because they believe facial expressions are the most important way to transfer emotional messages. We read those messages by interpreting expressions to decide whether a person is happy, frightened, angry, or nervous. Thus the Japanese robot is designed to detect emotions in the person it is ‘looking at’ by sensing changes in the spatial arrangement of the person’s eyes, nose, eyebrows, and mouth. It compares those configurations with a database of standard facial expressions and guesses the emotion. The robot then uses an ensemble of tiny pressure pads to adjust its plastic face into an appropriate emotional response.

G Other labs are taking a different approach, one that doesn’t try to mimic human intelligence or emotions. Just as computer design has moved away from one central mainframe in favour of myriad individual workstations – and single processors have been replaced by arrays of smaller units that break a big problem into parts that are solved simultaneously – many experts are now investigating whether swarms of semi-smart robots can generate a collective intelligence that is greater than the sum of its parts. That’s what beehives and ant colonies do, and several teams are betting that legions of mini-critters working together like an ant colony could be sent to explore the climate of planets or to inspect pipes in dangerous industrial situations.

Questions 14-19
Reading Passage 2 has seven paragraphs A-G. From the list of headings below choose the most suitable heading for each paragraph.

List of Headings
i Some success has resulted from observing how the brain functions.
ii Are we expecting too much from one robot?
iii Scientists are examining the humanistic possibilities.
iv There are judgements that robots cannot make.
v Has the power of robots become too great?
vi Human skills have been heightened with the help of robotics.
vii There are some things we prefer the brain to control.
viii Robots have quietly infiltrated our lives.
ix Original predictions have been revised.
x Another approach meets the same result.

14. Paragraph A
15. Paragraph B
16. Paragraph C
17. Paragraph D
18. Paragraph E
19. Paragraph F

Questions 20-24
Do the following statements agree with the information given in Reading Passage 2? In boxes 20-24 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

20. Karel Capek successfully predicted our current uses for robots.
21. Lives were saved by the NASA robot, Dante.
22. Robots are able to make fine visual judgements.
23. The internal workings of the brain can be replicated by robots.
24. The Japanese have the most advanced robot systems.

Questions 25-27
Complete the summary below with words taken from paragraph F. Use NO MORE THAN THREE WORDS for each answer.

The prototype of the Japanese ‘face robot’ observes humans through a (25)……………………which is planted in its head. It then refers to a (26)……………………of typical ‘looks’ that the human face can have, to decide what emotion the person is feeling. To respond to this expression, the robot alters it’s own expression using a number of (27)………………………..

SAVING LANGUAGE

For the first time, linguists have put a price on language. To save a language from extinction isn’t cheap – but more and more people are arguing that the alternative is the death of communities

There is nothing unusual about a single language dying. Communities have come and gone throughout history, and with them their language. But what is happening today is extraordinary, judged by the standards of the past. It is language extinction on a massive scale. According to the best estimates, there are some 6,000 languages in the world. Of these, about half are going to die out in the course of the next century: that’s 3,000 languages in 1,200 months. On average, there is a language dying out somewhere in the world every two weeks or so.

How do we know? In the course of the past two or three decades, linguists all over the world have been gathering comparative data. If they find a language with just a few speakers left, and nobody is bothering to pass the language on to the children, they conclude that language is bound to die out soon. And we have to draw the same conclusion if a language has less than 100 speakers. It is not likely to last very long. A 1999 survey shows that 97 per cent of the world’s languages are spoken by just four per cent of the people.

It is too late to do anything to help many languages, where the speakers are too few or too old, and where the community is too busy just trying to survive to care about their language. But many languages are not in such a serious position. Often, where languages are seriously endangered, there are things that can be done to give new life to them. It is called revitalisation.

Once a community realises that its language is in danger, it can start to introduce measures which can genuinely revitalise. The community itself must want to save its language. The culture of which it is a part must need to have a respect for minority languages. There needs to be funding, to support courses, materials, and teachers. And there need to be linguists, to get on with the basic task of putting the language down on paper. That’s the bottom line: getting the language documented – recorded, analysed, written down. People must be able to read and write if they and their language are to have a future in an increasingly computer- literate civilisation.

But can we save a few thousand languages, just like that? Yes, if the will and funding were available. It is not cheap, getting linguists into the field, training local analysts, supporting the community with language resources and teachers, compiling grammars and dictionaries, writing materials for use in schools. It takes time, lots of it, to revitalise an endangered language. Conditions vary so much that it is difficult to generalise, but a figure of $ 100,000 a year per language cannot be far from the truth. If we devoted that amount of effort over three years for each of 3,000 languages, we would be talking about some $900 million.

There are some famous cases which illustrate what can be done. Welsh, alone among the Celtic languages, is not only stopping its steady decline towards extinction but showing signs of real growth. Two Language Acts protect the status of Welsh now, and its presence is increasingly in evidence wherever you travel in Wales.

On the other side of the world, Maori in New Zealand has been maintained by a system of so- called ‘language nests’, first introduced in 1982. These are organisations which provide children under five with a domestic setting in which they are intensively exposed to the language. The staff are all Maori speakers from the local community. The hope is that the children will keep their Maori skills alive after leaving the nests, and that as they grow older they will in turn become role models to a new generation of young children. There are cases like this all over the world. And when the reviving language is associated with a degree of political autonomy, the growth can be especially striking, as shown by Faroese, spoken in the Faroe Islands, after the islanders received a measure of autonomy from Denmark.

In Switzerland, Romansch was facing a difficult situation, spoken in five very different dialects, with small and diminishing numbers, as young people left their community for work in the German-speaking cities. The solution here was the creation in the 1980s of a unified written language for all these dialects. Romansch Grischun, as it is now called, has official status in parts of Switzerland, and is being increasingly used in spoken form on radio and television.

A language can be brought back from the very brink of extinction. The Ainu language of Japan, after many years of neglect and repression, had reached a stage where there were only eight fluent speakers left, all elderly. However, new government policies brought fresh attitudes and a positive interest in survival. Several ‘semi­speakers’ – people who had become unwilling to speak Ainu because of the negative attitudes by Japanese speakers – were prompted to become active speakers again. There is fresh interest now and the language is more publicly available than it has been for years.

If good descriptions and materials are available, even extinct languages can be resurrected. Kaurna, from South Australia, is an example. This language had been extinct for about a century, but had been quite well documented. So, when a strong movement grew for its revival, it was possible to reconstruct it. The revised language is not the same as the original, of course. It lacks the range that the original had, and much of the old vocabulary. But it can nonetheless act as a badge of present-day identity for its people. And as long as people continue to value it as a true marker of their identity, and are prepared to keep using it, it will develop new functions and new vocabulary, as any other living language would do.

It is too soon to predict the future of these revived languages, but in some parts of the world they are attracting precisely the range of positive attitudes and grass roots support which are the preconditions for language survival. In such unexpected but heart-warming ways might we see the grand total of languages in the world minimally increased.

Questions 28-32
Do the following statements agree with the views of the writer in Reading Passage 3? In boxes 28-32 on your answer sheet write

YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this

28. The rate at which languages are becoming extinct has increased.
29. Research on the subject of language extinction began in the 1990s.
30. In order to survive, a language needs to be spoken by more than 100 people.
31. Certain parts of the world are more vulnerable than others to language extinction.
32. Saving language should be the major concern of any small community whose language is under threat.

Questions 33-35
The list below gives some of the factors that are necessary to assist the revitalisation of a language within a community.

Which THREE of the factors are mentioned by the writer of the text?

A the existence of related languages
B support from the indigenous population
C books tracing the historical development of the language
D on the spot help from language experts
E a range of speakers of different ages
F formal education procedures
G a common purpose for which the language is required

Questions 36-40
Match the languages A-F with the statements below (Questions 36-40) which describe how a language was saved.

A Welsh
B Maori
C Faroese
D Romansch
E Ainu
F Kaurna

36. The region in which the language was spoken gained increased independence.
37. People were encouraged to view the language with less prejudice.
38. Language immersion programmes were set up for sectors of the population.
39. A merger of different varieties of the language took place.
40. Written samples of the language permitted its revitalisation.