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If you are a policy maker, what steps you would take to protect endangered species?5.Elaborate how nitrogen circulates between biotic and abiotic component on earth6.What is mean by clean energy and why it is important for a sustainable society?7.Give any three examples for the sources of pollutants in the indoor environment.8. Give any two examples for the adverse environmental effects of converting waste to energy.9pH of the rain water is 5. Explain the mechanism that leads to its acidity.10. Explain how NGOs can play a major role to make India benefit from carbon trading​

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