Agence France-Presse: UN talks tasked with forging a global climate treaty by year’s end were set to resume here on Sunday, with all eyes on the debut appearance of US negotiators from the administration of US President Barack Obama. Some 190 countries are struggling to find a common accord on how to slash greenhouse gas emissions beyond 2012, when Kyoto Protocol provisions expire. Many are banking on Obama to breathe new life into the troubled process. In Washington, meanwhile, the US president on …