A dam generates power along the Manicouagan River north of Baie-Comeau, Quebec, June 22, 2010. Importing more of Canada's historically abundant hydroelectricity is seen by some as a key component to making the U.S. electric grid carbon-free by 2035, as well as improving energy reliability and cost for American consumers. (Jacques Boissinot/The Canadian Press via AP, File)
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