List any four methods of conserving fossil fuels.

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.

How much area is under the forest cover in our country (in $\text{ sq km}$)?

In our country,vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes

What is the most significant importance of wildlife?

It is important to make small check dams across the flooded gullies because they
$(i)$ hold water for irrigation
$(ii)$ hold water and prevent soil erosion
$(iii)$ recharge groundwater
$(iv)$ hold water permanently