Reuters: The United Nations insisted Wednesday that it should keep guiding talks on a new climate pact despite near-failure at a summit last month when a few countries agreed a low-ambition “Copenhagen Accord.” Yvo de Boer, head of the U.N.’s Climate Change Secretariat, said negotiations in 2010 would be based on U.N. talks launched in 2007 about how to extend the existing Kyoto Protocol and on involving all nations in action. The three-page Copenhagen Accord, championed by big emitters …