Guardian: BP has dropped all plans to build wind farms and other renewable schemes in Britain and is instead concentrating the bulk of its $8bn (£5bn) renewables spending programme on the US, where government incentives for clean energy projects can provide a convenient tax shelter for oil and gas revenues. The decision is a major blow to the prime minister, Gordon Brown, who has promised to sweep away all impediments to ensure Britain is at the forefront of the green energy revolution. BP and …