Agence France-Presse: Carbon-curbing pledges under the Copenhagen Accord are likely to doom Earth to warming of three degrees Celsius (5.4 degrees Fahrenheit) or more, compared to the deal’s target of 2 C (3.6 F), scientists said on Wednesday. In an analysis published by the journal Nature, researchers at the Potsdam Institute for Climate Impact Research (PIK) near Berlin said the promises fell very short of the headline-making mark. “It’s amazing how unambitious these pledges are,” they …