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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.
Sources of electrical energy. Electrical energy is produced from many different energy sources. Some of these energy sources are renewable and others are non-renewable. Most of the electricity used in Australia is made from power plants that burn fossil fuels to create steam.