Agence France-Presse: The UN’s pointman on climate change pleaded for calm on Wednesday after angry spats erupted over the outcome of the much-trumpeted world climate summit in Copenhagen. Yvo de Boer, executive secretary of the UN Framework Convention on Climate Change (UNFCCC), warned “all this finger-pointing and recrimination” could cloud negotiations next year for sealing a post-2012 pact on tackling global warming. “We need to work together constructively, whereas countries are in the media …