Guardian: European leaders have reached a compromise deal on how to cut carbon emissions, diplomats said, on the second day of a heads of state summit in Brussels. The plan lays out the ways in which the EU’s 27 members will cut carbon emissions by 20% by 2020 and is intended to set an example for world efforts to tackle climate change. It includes various burden-sharing measures meant to ensure that the cost of curbing pollution will not impede economic growth. The cost of the plan had …