Scotsman: FARMERS in Scotland last night criticised a warning from the UK’s chief environmental scientist that an increased reliance on biofuels could send greenhouse gas emissions soaring. Professor Robert Watson spoke out just days before Westminster is to introduce a policy dictating minimum levels of the fuels at the pumps. He said it would "obviously be totally insane" to have a scheme aimed at reducing greenhouse gases by using biofuels, which instead led to an increase …