The results of CP16/CMP6 in Cancún, Mexico, held from November 29 through December 10, 2010, offer a reason to celebrate even though a post-2012 climate deal was not struck and thorny issues will remain unresolved until next year at CP17/CMP7 in Durban, South Africa. Both the UNFCCC as well as the Kyoto Protocol governing bodies adopted comprehensive, new and substantive decisions in Cancún.