AFP: The world’s largest offshore wind farm opened in Britain on Thursday, as part of the government’s bid to reduce the carbon emissions that drive climate change. The project received a qualified welcome from environmental campaigners. The site, a forest of giant turbines in the North Sea off the east Kent coast, has 100 turbines installed so far with a total of 341 planned. Swedish energy company Vattenfall, which built the farm, says it has the potential to power 200,000 …