The power generated by rotating turbines using water is called hydropower. It is the main source of energy which is a pollution-free and renewable source of energy. Energy trapped in the flowing river is used to generate power on large scale in power stations which a cheaper for the long term & widely cued in electric devices. But petroleum products are temporary. They are only for a short period of time. These products are formed from the dead remains of plants and animals that include mineral oil, coal, and natural. These resources are limited in nature. Hence, the use of hydropower should be increased rather than that of petroleum products to get energy.