i) What type of energy is produced in this picture?

ii) What difficulties do we face in harnessing this energy? Explain.

iii) Why do we say that this energy is better than solar energy and atomic energy?

i) Wind energy is produced in the given picture. Wind is a renewable source of energy and energy from the wind can be harnessed using wind mills which are shown in the picture.

ii) We face following difficulties while harnessing wind energy:

● Wind farms can be established only in those areas where the wind blows for a greater part of the year. Also, the speed of wind should be higher than 15 km/h to run the wind mills.

● Establishment of wind farms requires large areas in plains.

● Since blade and towers of a wind mill are exposed to sun, storm, rain, therefore they need a high level of maintenance.

● The initial cost of establishment is quite high.

iii) Wind energy can be said better than solar and atomic energy in following ways:

● Wind energy does not produce any waste material whereas the atomic energy involves the production of radioactive waste which is very harmful to the environment.

● Harnessing wind energy is cheaper than harnessing solar energy and atomic energy. Solar cells are made up of expensive materials and elements used for harnessing atomic energy are also very costly.

● Wind energy does not involve any risks of accidents whereas atomic energy possesses a huge threat of nuclear disasters.