Causeymire Wind Farm, Caithness, Scotland, United Kingdom

Solar panels and air conditioning on apartments next to the City Wall, Xian, China

Solar panels on rooftops of apartment blocks in Xian seen from the Dayan Pagoda, China

Men riding modified bicycles on forest path

Man riding modified bicycles on forest path

Man riding modified bicycles on forest path

EON Nuclear Power Plant Isar II, reactor building, spent fuel pool, refueling stage, converting fuel assembly, Essenbach, Bavaria, Germany, Europe