Every year, the United States consumes more than 3 trillion KWh of electricity. This power is generated by coal-fired power plants, nuclear plants, solar panels, hydroelectric damns, wind turbines, geothermal wells, and other sources and it requires water to produce.
As much as 41% of all water used in the United States goes to power plants to produce electricity, making them the single largest water consumer in the nation.
via Infographic On The Energy-Water Collision: How Hot, Dry Summers Impact Water and Power Generation.
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