Yale Environment 360: British Prime Minister David Cameron has inaugurated the worlds largest offshore wind farm, a 630-megawatt project capable of producing enough electricity to power 500,000 homes. The $2.3 billion project -- located 12 miles offshore in the North Sea, east of London -- is being operated by an international consortium that includes Chinas Dong Energy, Germans E.ON, and Abu Dhabis Masdar. The so-called London Array project, which contains 175 turbines, began producing some energy in April but was...