Guardian: The heads of 61 power groups in the EU tonight have committed to achieving carbon-neutral electricity within an integrated power market by 2050. Their declaration, handed to Andris Piebalgs, EU energy commissioner, comes as Europe is under attack for lowering its ambitions to combat climate change, handing over leadership to the US and China and reneging on efforts to help the poorest developing countries adapt to a low-carbon economy. The chief executives, including from the …