Guardian: The UN secretary-general Ban Ki-moon, today urged environment ministers to reject attempts by sceptics to undermine efforts to forge a climate change deal, stressing that global warming poses “a clear and present danger.” In a message read by a UN official, Ban referred to the controversy over mistakes made in a 2007 report issued by the UN-affiliated Intergovernmental Panel on Climate Change (IPCC) which have been criticised by climate sceptics. Despite the failure to forge a …