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Hydroelectricity is electricity generated by hydropower, i.e., the production of power through use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy. Once a hydroelectric complex is constructed, the project produces no direct waste.
In light of diminishing fossil fuels, however, renewable energy may end up as the energy of choice for the 21st century. There are a few types of renewable energy: Solar energy The sun The sun is the sores of all energy.It sends energy in all directions. It is about 150 million km from earth.n terms of power, there are also far more than three types. For power there is: solar power, wind power, geothermal energy, and basically anything that can turn a wheel and power a generator.