Politics.co.uk: Eminent surgeons and physicians from across the world have signed a joint letter calling for the government to see climate change as a priority health issue. The letter, a copy of which has been sent to Gordon Brown and Ed Miliband, was published jointly by the BMJ and the Lancet today. It emphasises the benefits a low-carbon economy and diet would have on health, including lower rates of cancer, obesity, diabetes and heart disease. It also warns that a failure of world …