Questions 1-2
Choose TWO letters, A-E
Which two problems are caused by water hyacinth?
A plants and fish are poisoned
B Farmers cannot fish
C the dam’s structure is damaged
D Electricity production is affected.
E electricity production is affected.
Questions 3-6
Choose the correct letter, A. B or C.
3 Where was water hyacinth originally from?
A latin America
B Africa
C Europe
4 What is the primary cause of the decrease in nutrients from the soil?
A soil erosion
B a change of rainfall
C loss or trees
5 When will the biological solution bring risks to the environment?
A immediately
B 6 months later
C many years later
6 What does John say about the mechanical solution?
A ineffective
B dangerous
C expensive
Question 7-10
What is the benefit of the cut down water hyacinth to each of the following aspects?
Choose Four answers from the box an write the correct letter, A-F next to Questions 7-10
Benefits of the cut-down water hyacinth
A can reduce the effect of global warming
B can be used an alternative energy resource
C can make quick profits
D can produce materials for plants to grow in
E can be good for human health
F can produce fertilizer
7 dried water hyacinth
8 mushroom farmers
9 oyster and straw mushrooms
10 cows
