An anonymous reader writes "The 2010 Solar Decathlon Europe kicked off today in Madrid, Spain, with a stunning array of solar-powered prefab homes. Seventeen teams from around the globe are battling it out in the center of the city to see who has the most efficient solar-powered and eco-friendly house. Just as in the competition in Washington DC, the teams will be graded on minimal energy use, innovative architecture and engineering, sustainability, and more. Check out these exclusive photos from the event for a first look at the most exciting houses in this year's competition."
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