832-268138 - Photovoltaic system on the roof of the mountain station of the Arber Mountain Railway at Mount Grosser Arber near Bayerisch Eisenstein in the Bavarian Forest, Bavaria, Germany, Europe
832-270398 - A bottle of ethanol and some of the materials ethanol can be made of at the National Renewable Energy Laboratory, operated by the US Department of Energy, where scientists are developing economical processes for making cellulosic ethanol from non-edible p
832-268355 - Photovoltaic system on the roof of the mountain station of the Arber Mountain Railway at Mount Grosser Arber near Bayerisch Eisenstein in the Bavarian Forest, Bavaria, Germany, Europe
832-241158 - Photovoltaic solar collectors at the largest photovoltaic power plant in the US, operated by SunEdison, generates 8.22 megawatts, San Luis Valley, Alamosa, Colorado, USA
832-244274 - Aerial photo, solar roof, flat renovation to the north of the Opel factory 1, Langendreer, Bochum, Ruhr area, North Rhine-Westphalia, Germany, Europe