Solar Decathlon (13 images)

The public views the Team Germany house in the 2009 Solar Decathlon on the National Mall in Washington on October 8, 2009. Twenty university teams built high-tech, high-efficiency solar-powered homes to showcase "green" design and technology. UPI/Roger L. Wollenberg

Members of Team Germany work in their house in the 2009 Solar Decathlon on the National Mall in Washington on October 8, 2009. Twenty university teams built high-tech, high-efficiency solar-powered homes to showcase "green" design and technology. UPI/Roger L. Wollenberg

Members of the Iowa State team put finishing touches on the roof of their house in the 2009 Solar Decathlon on the National Mall in Washington on October 8, 2009. Twenty university teams built high-tech, high-efficiency solar-powered homes to showcase "green" design and technology. UPI/Roger L. Wollenberg

The public views the University of Minnesota's house in the 2009 Solar Decathlon on the National Mall in Washington on October 8, 2009. Twenty university teams built high-tech, high-efficiency solar-powered homes to showcase "green" design and technology. UPI/Roger L. Wollenberg