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.
Choose the correct letter, A. B or C.
3 Where was water hyacinth originally from?
A latin America
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?
B 6 months later
C many years later
6 What does John say about the mechanical solution?
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
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