Austrian architects Coop Himmelb(l)au have designed an energy-generating canopy for a passageway in Perugia, Italy. Called Energy Roof, the structure will consist of three layers: photovoltaic cells at the top, structure and wind turbines in the middle, and a glazed underside. Here's some more information from Coop Himmelb(l)au: -- Wolf D. Prix presents 'Energy Roof'