Igor Shpilenok / The cold waters of the Pacific ocean wash the shores of Kamchatka, above which fiery volcanic ridges rise, Kronotsky Zapovednik, Kamchatka, Far East Russia

Ashley Cooper / Asia's largest solar popwer station, the Gujarat Solar Park, in Gujarat, India. It has an installed capacity of 1000 MW. Here workers wash dust off the panels to increase their efficiency. December 20...

Ashley Cooper / Asia's largest solar popwer station, the Gujarat Solar Park, in Gujarat, India. It has an installed capacity of 1000 MW. Here workers wash dust off the panels to increase their efficiency. December 20...

Ashley Cooper / Asia's largest solar power station, the Gujarat Solar Park, in Gujarat, India. It has an installed capacity of 1000 MW. Here workers wash dust off the panels to increase their efficiency. December 201...

Ashley Cooper / Workers washing the heliostats to maximise reflective power at the Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 meg...

Ashley Cooper / Workers washing the heliostats to maximise reflective power at the Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 meg...

Ashley Cooper / The Syncrude upgrader plant for processing tar sands to create synthetic oil. Alberta, Canada. August 2012