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There are many hydroelectric operations in California for example, Mammoth Pool Dam

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A con of hydroelectric is the dams block the water flow of rivers and lakes and that can have a great effect on the wild life and sea life.

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Some pros of hydroelectric energy are that it is renewable, clean, and domestic.

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Hydroelectric power is renewable because water is renewable.

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2,000 years ago the Greeks used it and in the early 1900 the engineers exctended it dramatically to help them get electricity. Hydroelectric is a renewable resource where there are large dams blocking the flow of water, as the water moves through the openings in the dams the flow of water helps the turbine engines generate electricity.

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Hydroelectric power is inorganic because water is inorganic and has never been alive.

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this video shows how it works