Agence France-Presse: Seventy-five countries accounting for more than 80 percent of greenhouse gases from energy use have filed pledges to cut or limit carbon emissions by 2020, the UN climate convention said Wednesday. The promises, made under the Copenhagen Accord, are only a step towards wider action to tackle global warming, the UN Framework Convention on Climate Change (UNFCCC) said in its official report on December’s world climate summit. A total of 111 countries plus the European Union (EU) …