It might sound odd that we can use water to make electricity - the two don't usually mixed very well. Energy can be harnessed using a water source, peferably one that is moving, and a spinning turbine. The water flowing down a river, for example, can be used to spin a turbine which is connected to a generator which generates electricity.

People have used water power for more than 2,000 years. Ancient Egyptians used water wheels for grinding grain, and early Americans learned how to use them for sawing wood.

Hydroelectric power can be far less expensive than electricity generated from fossil fuels or nuclear energy. Areas with abundant hydroelectric power attract industry. Factories can readily use this form of alternative energy as a resource.

The chief advantage of hydroelectric dams is their ability to handle seasonal high peak loads. When the electricity demands drop, the dam simply stores more water (which provides more flow when it releases). Some electricity generators use water dams to store excess energy by using the electricity to pump water up into a basin. Electricity can be generated when demand increases.

Hydro power is a proven method for gathering energy. A lot of cities already utilize this form of energy.