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Hydroelectric Power Plant

How do we get electricity from water? Actually, hydroelectric power plants produce electricity. A hydroelectric plant uses falling water to turn a propeller-like piece called a turbine, which then turns a metal shaft in an electric generator, which is the motor that produces electricity.

The theory is to build a dam on a large river that has a large drop in elevation. The dam stores lots of water behind it in the reservoir. Near the bottom of the dam wall there is the water intake. Gravity causes it to fall through the penstock inside the dam. At the end of the penstock there is a turbine propeller, which is turned by the moving water. The shaft from the turbine goes up into the generator, which produces the power. Power lines connected to the generator, carry electricity to every home. The water continues past the propeller through the tailrace into the river past the dam.

But, constructions of big dams have certain problems associated with it. The dams can be constructed only in a limited number of places. Large areas of agricultural land and human habitation are to be sacrificed as they get submerged. The vegetarian, which is, submerged rots under the anaerobic conditions and emits methane gas which is also a green-house gas.

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