Deutsche Presse-Agenture: It is time for the world to get down to the tough details on how to fight global warming, the European Union executive said yesterday ahead of a key climate conference in the Polish city of Poznan. The conference “must shift gear from exploratory discussions to concrete negotiations,” and aim for a global deal at a similar conference to be held in Copenhagen in a year’s time, EU Environment Commissioner Stavros Dimas said in a statement. The European Commission and EU member states …