HYDROELECTRIC POWER
Hydroelectric power is generated by the moving force that water exerts. The most common method of generating hydroelectricity is dammed, although power can also be generated from paddle wheels, waves, sea currents, and any other form of moving water. Hydroelectric power is actually the most common kind of renewable energy in use, and with good reason.
Hydroelectric power is considered an excellent way to generate power because of its dependable output and low maintenance needs. Hydroelectric dams are an excellent source of power because once they are built they require no additional fossil fuels to operate, and need very little maintenance to remain operational. In fact, some dams have been generating energy for up to one hundred years, which makes them an excellent renewable power source.