Atelier Tekuto, a Tokyo-based architecture firm, has developed a prefab aluminum house "with walls that act as both structure and thermal radiators." It pumps geothermal heat throughout the aluminum structure, and is powered by a wind turbine and photovoltaics, a solar power technology. The hollow aluminum components, which allow hot and cold water pipes and electrical cables to be channeled through the walls, are currently being built in a factory. The house is due to be constructed later this year. Learn more at Dezeen.