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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.
Electricity can come from renewable sources, such as hydroelectric plants (movement of water over a turbine), geothermal plants (heat from inside the earth makes steam to move â¦ turbines), nuclear plants (heat made in nuclear reactors moves turbines), windmills, or solar panels.f you were to use fossil fuels (oil, coal, gas) to power these devices, then the burning of these fuels would add CO2 to the atmosphere, and CO2 is a greenhouse gas, meaning that it contributes to global climate change.