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Tim Johnson

solar

In this Sept. 14, 2011 photo, Tim Johnson poses for a portrait with solar panels on his roof in Philadelphia. Since March, he has generated 50 percent to 75 percent of his electricity with a set of solar panels on his roof, saving 20 percent on his electricity bills. More solar energy is being planned in the U.S. than any other power source, including nuclear, coal, natural gas and wind. (AP Photo/Matt Rourke)

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