Q1 of 76 Page 258

Name two fossil fuels.

The two very common fossil fuels are coal and petroleum.

Coal is a flammable hard rock majorly made of carbon with some parts of oxygen, sulphur, nitrogen and hydrogen.

Petroleum is a thick yellow-black liquid majorly made of hydrocarbons, used for various types of fuels.

Name the major programme started to replenish forests.

Apart from the availability of forest products, name two other things which are affected by the destruction of forests.

Name the rivers with which the following dams are associated:

(a) Tehri Dam

(b) Sardar Sarovar Dam

Name two factors which can be used to find whether river water has been contaminated.