Holes dug in the earth to take out minerals are called:

Coal, kerosene and petrol are used as:

National parks and sanctuaries are created by the Government to protect and preserve:

Which of the following is used for making electrical goods?

Biogas is produced from:

If the trees are cut down, the amount of rainfall:

Which of the following is an alternative source of energy?

Liquefied petroleum gas (LPG) is used for:

a) Running vehicles

b) Cooking

c) Making electricity

World environment day is on:

Which of the following is not a renewable resource?