★ Pollution Quiz
Which of the following is not a natural cause of water pollution?
A. Volcanoes
B. Animal waste
C. Oil spills
D. Silt from storms and floods
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What can happen to fish when there is not enough oxygen in the water?
A. They can suffocate
B. They can’t float
C. They can’t see.
D. Nothing. Fish don’t need oxygen.
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