David Woodfall / Sunrise over offshore wind turbine farm, Essex, England, UK, December.

Milan Radisics / Aerial shot of the Gemasolar Thermosolar Plant owned by Torresol Energy, it uses molten salt as its heat transfer fluid and energy storage medium to produce energy for up to 24 hours a day, Seville, S...

Milan Radisics / Aerial shot of the Gemasolar Thermosolar Plant owned by Torresol Energy, it uses molten salt as its heat transfer fluid and energy storage medium to produce energy for up to 24 hours a day, Seville,...

Ashley Cooper / Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011

Ashley Cooper / Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011

Ashley Cooper / Sun rays reflected onto solar tower at Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 megawatts (MW) of electricity....

Juan Manuel Borrero / Wind turbines, Collet dels Feixos, Tarragona, Catalonia, Spain, May 2013.

Ernie Janes / St Benets Level Drainage Mill at sunset. Norfolk Broads, England, UK, February.

Ernie Janes / Fulmar (Fulmaris glacialis) in flight with Hunstanton, Norfolk, England, UK, February.

Ernie Janes / Sherringham off shore windfarm in distance, and rainbow during storm, Weybourne, Norfolk, November

Orsolya Haarberg / Wind turbines for renewable energy, Masoy, Finnmark, Norway, July 2006

Philippe Clement / Photovoltaic solar panels on roof of house inside incandescent lamp / bulb against black background Digital composite