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What are the problems caused by the non-biodegradable wastes that we generate?
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What will happen if we kill all the organisms in one trophic level?
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Which of the following are environment-friendly practices? (a) Carrying cloth-bags
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Which of the following constitute a food-chain? (a) Grass, wheat and mango
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How can you help in reducing the problem of waste disposal? Give any two methods.
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What is ozone and how does it affect any ecosystem?
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What is the role of decomposers in the ecosystem?
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Give any two ways in which biodegradable substances would affect the environment.
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Why are some substances biodegradable and some non-biodegradable?
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