Steve Nicholls / Wind turbines of a wind farm off the coast of The Wash with mudflats in the foreground, Snettisham, North Norfolk, UK, November 2010

Rob Cousins / Wind turbines near the coast at Cabo Vilan, Galicia, Spain, May 2011.

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

Guy Edwardes / Wind turbines near Kilmore Quay viewed from boat at dawn. Co. Wexford, Republic of Ireland, Europe June 2010.

Philippe Clement / Wind farm turbines against cloudy sky seen inside incandescent lamp / bulb against white background Digital composite

Philippe Clement / Oosterscheldekering / Eastern Scheldt storm surge barrier, the largest of 13 dams designed to protect the Netherlands from flooding. Neeltje Jans, Netherlands, March 2010

Nick Upton / Common / Eurasian crane (Grus grus) flock flying close to wind turbines, Near Diepholz, Lower Saxony, Germany, October 2009

Nick Upton / Common / Eurasian crane (Grus grus) flock flying close to wind turbine, Near Diepholz, Lower Saxony, Germany, October 2009

Graham Eaton / Knot (Calidris canutus) flock flying in front of East Hoyle Windfarm, Wirral, UK, November 2008

David Kjaer / Flock of Common Crane (Grus grus) flying over wind turbines on migration in Poland. Wind farm.

Niall Benvie / Looking up at the blades of a 2.3 megawatt wind turbine, Scotland UK. May 2006

Philippe Clement / Wind farm turbines against cloudy sky, Los Monegros, Spain