2009 Solar Decathlon
A visitor walks over a sliced stone mosaic that collects heat during the day and provides passive heating when the temperature drops at the Iowa State University's solar-powered house during the 2009 U.S. Department of Energy Solar Decathlon on the National Mall in Washington, D.C., Saturday, Oct. 10, 2009.
(Photo by Stefano Paltera/US Dept. of Energy Solar Decathlon)
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Uploaded on October 11, 2009
Taken on October 10, 2009
2009 Solar Decathlon
A visitor walks over a sliced stone mosaic that collects heat during the day and provides passive heating when the temperature drops at the Iowa State University's solar-powered house during the 2009 U.S. Department of Energy Solar Decathlon on the National Mall in Washington, D.C., Saturday, Oct. 10, 2009.
(Photo by Stefano Paltera/US Dept. of Energy Solar Decathlon)
1,292
views
2
faves
0
comments
Uploaded on October 11, 2009
Taken on October 10, 2009