1. The better way to assess the pollution level of a water body is to calculate the:

2. The purpose of rainwater harvesting is to:

3. ‘Kulhs’ the ancient water harvesting structure were made in

4. The three R’s that will help us to conserve natural resources for long term use are

5. Amrita Devi Bishnoi sacrificed her life to protect the

6. Khadins, bundhis, ahars and kattas are ancient structures built for the purpose of:

7. The Tehri Dam is constructed on River

8. The degraded Arabari forests were revived by the efforts of

9. Which plan has been started by government to control pollution of Ganga?

10. Which pH range is most suitable for life of fresh water plants and animals?