Herald: Emily Beament There were renewed calls last night to stop the building of new coal-fired power stations in the UK as the government’s Climate Change Committee called for large emissions cuts by 2020. The Committee on Climate Change, chaired by Adair Turner, said the UK must cut its greenhouse gas output by at least 34% on 1990 levels by 2020 and by even more if an international deal on reducing greenhouse gases is agreed. If the current UN negotiations lead to a new deal on …