In the U.S., the Obama administration has been a big advocate for solar energy, with Mr. Obama recently touring and speaking at Sempra's Copper Mountain Solar 1 facility in Boulder City, Nev. (Associated Press)
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In the U.S., the Obama administration has been a big advocate for solar energy, with Mr. Obama recently touring and speaking at Sempra's Copper Mountain Solar 1 facility in Boulder City, Nev. (Associated Press)
