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2009 Solar Decathlon | by Dept of Energy Solar Decathlon
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2009 Solar Decathlon

Eclipses sun screens, right, and a gray water filtration system, bottom, reflect the sun off the solar-powered Virginia Tech house during the 2009 U.S. Department of Energy Solar Decathlon on the National Mall in Washington, D.C., Monday, Oct. 05, 2009. (Photo by Stefano Paltera/US Dept. of Energy Solar Decathlon)

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Taken on October 5, 2009