What is water harvesting? How can this technique help in the conservation of water?

Prepare a list of five items that you use daily in school. Identify from the list which of these items can be recycled.

How many National Parks are there in India?

The three $R's$ that will help us to conserve natural resources for long-term use are

Non-judicious use of forest resources has a very little effect on biodiversity.

In our country,there are attempts to increase the height of several existing dams like Tehri and Almati,dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams:
$(i)$ Terrestrial flora and fauna of the area is destroyed completely.
$(ii)$ Dislocation of people and domestic animals living in the area.
$(iii)$ Valuable agricultural land may be permanently lost.
$(iv)$ It will generate permanent employment for people.