Grand Coulee Dam on Columbia river, Washington
![Grand Coulee Dam on Columbia river, Washington Grand Coulee Dam on Columbia river, Washington](/sites/default/files/images/2012/3-6_grand_coulee_dam_on_columbia_river.jpg)
Of the renewable energy sources that generate electricity, hydropower is the most often used. It accounted for 7 percent of total U.S. electricity generation and 73 percent of generation from renewables in 2005.
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