Agence France-Presse: Europe sought to put itself at the head of the global climate debate on Thursday with a landmark aid pledge worth billions of euros to help the developing world tackle the effects of global warming. But leaders struggled to find immediate agreement on a total offer worth around six billion euros (nine-billion-dollars) intended to help assuage poorer nations’ concerns about a deal at the UN climate talks in Copenhagen. At the first day of a two-day European Union summit in …