Hydropower is one of the largest sources of clean, renewable energy used in the United States. It accounts for roughly 6 to 8 percent of all electricity produced within the country. Hydropower, or power generated by water, usually works by damming up a water source to build up pressure. By channeling the water through the dam, the strength of the water flow is increased. The power of this flow turns turbines, which in turn are connected to generators that produce energy. This energy is turned into hydroelectric power, which is then delivered to the nation's electricity grid.
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