Reuters: The British government’s latest plan to power every UK home with offshore turbines is a costly fantasy and ignores the potential of onshore wind, the CEO of green power company Ecotricity said in an interview. On Monday the government said Britain could have up to 33 gigawatts of turbines churning out carbon-free power around its blustery coastline by 2020. The target, enough to supply every home in Britain with clean energy, was met with widespread scepticism over cost, grid …