Solar Energy

May 12, 2018

2009 Solar Decathlon

2009 Solar Decathlon
solar energy
Image by Dept of Energy Solar Decathlon
Visitors brave inclement weather to take a look at solar-powered houses during the 2009 U.S. Department of Energy Solar Decathlon on the National Mall in Washington, D.C., Thursday, Oct. 15, 2009. (Photo by Stefano Paltera/US Dept. of Energy Solar Decathlon)

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