Universal access to contraception is needed to help fight climate change, it has been claimed. A spiralling global population, with an annual increase of 79 million people, is driving up greenhouse gas emissions, John Guillebaud of University College, London, and GP Pip Hayes of St Leonard's Practice, Exeter, said. And in an editorial in the British Medical Journal they raised the question of whether people in the UK should be told that stopping at two children is "the simplest and biggest contribution" that can be made to saving the planet. The doctors said every person born adds to greenhouse gas...