Guardian: European leaders gather in Brussels on Thursday for a crunch summit, acutely divided over how to deliver on pledges to combat global warming almost two years after declaring they would show the rest of the world how to tackle climate change. The EU is split between the poorer east and the wealthy west. Germany says that most of their industries need not pay to pollute, Italy says it cannot afford the ambitious scheme, and Britain says that the package on the table could result in huge …