New Delhi, Sept. 11 -- With 13 days to go for the start of the UN Climate Changesummit in New York, it can only be hoped that world leaders recognise the urgent need to keep global warming below 2 degrees Centigrade over pre-industrial levels, Ovais Sarmad, deputy executive secretary of United Nations Framework Convention on Climate Change (UNFCCC), said in an interview to Jayashree Nandi on the sidelines of COP14 on desertification....