Question

What is meant by air pollution? Explain any two human activities that causes air pollution. Mention any three harmful effects of air pollution?
2. Mention any three important roles of water essential for the life of organisms on earth’s surface?
3. How is percentage of carbon dioxide maintained in the atmosphere? Mention one human activity which adds carbon dioxide in the atmosphere?
4. List three human activities which would lead to an increase in the carbon dioxide content of air?
5. What is the chemical formula of ozone? What essential function does this gas perform and where it is found? What are CFCs?
6. Mention three ways by which atmosphere regulates the average temperature on earth?
7. How are clouds formed? List any three human activities that you think would lead to air pollution and briefly explain each of them?
8. Write the composition of soil. On what basis is the type of soil decided?
9. In coastal areas, the wind blows from sea to land during the day. Why?
10. List three human activities responsible for the pollution of water bodies?

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Answer 1

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