Guardian: A global agreement on climate change is unlikely this year and it may need two separate legal treaties to bring together the US and developing countries, the UN’s top climate official has predicted. In an interview with the Guardian, the outgoing head of the United Nations Framework Convention on Climate Change, Yvo de Boer, said that there was no chance of reaching a final deal by November in Cancun, Mexico – the next time that world leaders will meet to hammer out the a follow-up to …