Natural resources should be used

Which one of the following resource is used to run steam engines and factories?

The Exhaustible resources are also known as

Plants are also known as

The resource used as fuel in cars, buses, scooters, ships and aeroplanes is

Sunlight is an example for

Which is extensively used for street lighting?

The top layer of the earth's surface in which plants grow is

Petroleum is refined in

Which one of the following is popularly known as black gold?