Hydropower - the renewable energy type, which generate energy from moving water power. Water power can be used in mechanics and production of electricity.
Solar energy vaporized water from earth water and water vapor rises to the top. Water vapor reaches the cooler atmospheric layer of air, they are condensed and formed clouds. Humidity falls to earth in the form of rain and snow, adding water reserves in the oceans and rivers. Hydropower is called a renewable energy source because the earth water is constantly receives its recharge precipitation.