Conversion of hydro energy to electrical energy :
Large amount of fossil fuels are burnt everyday in power stations to heat up water to produce steam which further runs the turbine to generate electricity. Many thermal plants are set up near coal or oil fields. In these plants fuel is burnt to produce heat energy which is converted into electrical energy.
Limitations of hydro energy are :
(i) Dams are very expensive to build.
(ii) It is not the biggest source of energy on earth.
