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Wind turbines belonging to the Thorntonbank Wind Farm located in the North Sea, 28 km (17 mi) off the coast of Belgium. Electricity generation started in early 2009, with an initial capacity of 30 MW, and that number is expected to rise to 300 MW by 2015. A 37 km (23 mi) 150 kV undersea cable connects the wind farm to the shore.Photo credit: Hans Hillewaert
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