Vegetarian superstar Sir Paul McCartney has repeated his call for everyone to cut back on eating meat to fight global warming.Sir Paul told the European Parliament: “I urge you, each of you, to do your bit, for your people, for their children and for the planet they will inherit. Go meat-free one day. Thank you.” At a ‘less meat = less heat’ hearing, the ‘Meat-Free Monday’ campaign led by the former Beatle suggested that a lower-meat diet could see greenhouse gases vastly reduced. The chairman of the UN intergovernmental panel on climate change, Rajendra Pachauri, joined McCartney in Brussels. In the run-up to international climate change talks in Copenhagen, the singer-environmentalist claimed the livestock sector is responsible for 18 per cent of the world’s greenhouse gas emissions. The medical journal, The Lancet, proposes people should not eat more than 90 grammes of meat per day. By some calculations, on average, people in developed Western countries consume, in a year, their own body weight in meat.