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10. Tell us two steps that can be taken to minimise global warming. 1

Concept –Controlling air pollution.

1. Suggest any two steps by which we can minimise air pollution. 1

2. What steps can be followed in our house to minimise air pollution? 1

3. Why is it necessary to control air pollution? 1

4. In school how can you try to control air pollution? 1

Concept –Water pollution.

1. What is water pollution? 1

2. What do you mean by water pollutants? 1

3. Write down two sources of water pollution. 1

4. Write down two sources of water pollution in your home. 1

5. How industries cause water pollution? 1

6. Write down two effects of water pollution. 1

7. What steps have been taken to save the river Ganga from getting 1
polluted?

8. How can we control water pollution? 1

9. List two ways by which we can conserve water. 1

10. What do you mean by potable water? 1

11. How chlorination of water can help to get safe drinking water? 1

12. How boiling the water helps to make it fit for drinking? 1

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