157 videos|398 docs|239 tests
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1. What are the harmful effects of water pollution? | ![]() |
2. What are the main causes of water pollution? | ![]() |
3. How does water pollution affect aquatic life? | ![]() |
4. How does water pollution affect human health? | ![]() |
5. What can be done to prevent water pollution? | ![]() |
157 videos|398 docs|239 tests
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