Guardian: What is the Cancún COP16 climate change summit? From 29 November to 10 December, environment officials and ministers will meet in Cancún in Mexico for the UN climate change conference to continue efforts towards an international deal on cutting carbon emissions. They will work on a global agreement to succeed the Kyoto protocol – which came into force in 2005 and commits rich countries to cut their emissions by 2012 – after the talks at Copenhagen last year failed to replace …