A wind energy fair in Husum, northern Germany, September 2010Photograph: Johannes Eisele/AFP/Getty ImagesWind turbine towers are welded at the DMI Industries plant in Stevensville, Ontario, Canada, June 2011 Photograph: Norm Betts/Getty ImagesArtur Carmo, of Martifer Energy Systems SGPS SA, inspects the inside of a wind turbine stem at the company's manufacturing centre in Oliveira de Frades, Portugal, August 2010Photograph: Mario Proenca/Getty Images
Employees at the ABB AG factory work on a components for a wind turbine generator at the company's plant in Tallinn, Estonia, November 2011Photograph: Simon Dawson/Getty ImagesA wind turbine is assembled at the Guodian United Power Technology Company in Baoding city, Hebei province, China, June 2011Photograph: Feng Li/Getty ImagesBlades for Vestas Wind Systems A/S wind turbines are stored at the company's factory in Tianjin, China, September 2010 Photograph: Nelson Ching/Getty ImagesFinished wind turbine blades stored ahead of shipping at the Siemens AG plant in Aalborg, Denmark, November 2011 Photograph: Timothy Fadek/Getty ImagesWind turbine blades ready to be transported from a factory in China's northern Hubei province, September 2010Photograph: Peter Parks/AFPMassive three-pronged legs made from steel at the Cuxhaven Steel Construction GmbH facility in Cuxhaven, Germany, are prepared for transportation to the North Sea, where they were to be used in Germany's first offshore windfarmPhotograph: Sean Gallup/Getty ImagesParts of a Vestas Wind Systems A/S turbine await assembly at the Sacramento Municipal Utility District wind power plant in Rio Vista, California, November 2011Photograph: Ken James/Getty ImagesA Suzlon Energy wind turbine during construction at the Edison Mission Group Big Sky windfarm in Ohio, Illinois, September 2010 Photograph: Daniel Acker/Getty ImagesA crane hoists the hub and blades for a 1.5 megawatt wind turbine being built at International Power Canada's Plateau windfarm in Ontario, Canada, September 2011Photograph: Norm Betts/Getty ImagesStill in Ontario, a worker guides the hub and blades of the wind turbine into positionPhotograph: Norm Betts/Getty ImagesSturt Daley, site manager, stands atop a wind turbine nacelle at Capital Wind Farm in Bungendore, Australia, December 2010Photograph: Ian Waldie/Getty ImagesStill in Australia, a wind turbine operates at the Capital Wind FarmPhotograph: Ian Waldie/Getty ImagesAcciona turbines operate at the NaturEner USA LLC Glacier windfarm in Ethridge, Montana, August 2010 Photograph: Andrew Harrer/Getty ImagesWind turbines belonging to China Resources New Energy Group spin in Shantou, Guangdong province, China, January 2011Photograph: Forbes Conrad/Getty ImagesAn electric substation at a wind turbine location in ShantouPhotograph: Forbes Conrad/Getty Images
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