Atomic energy is generated by splitting nuclear substances such as the atoms of uranium, thorium, cheralite, zircomium under controlled conditions. Splitting of these atoms gives out lot of energy which can be used for a variety of purposes such as generating electricity.(ii) In modern times, more and more countries are using nuclear energy to meet their demands. There are such atomic power stations in United States of America, France, Russia, and England.(iii) Nuclear energy is playing an increasingly important role in India. India has also set up atomic power stations at Tarapur, Kota, Kalpakkam and Narora.(iv) Hydro electricity is not sufficient where there are no ever flowing perennial rivers.Therefore, we cannot depend upon hydro-electricity. The nuclear power is being proved very useful and economical. Nuclear power plant can be set up at any place.