Guardian: The government today committed the UK to cutting greenhouse-gas emissions by 80% by the middle of the century in a bid to tackle climate change. In a move that was widely welcomed by environmental campaigners, Ed Miliband, the new energy and climate change secretary, said that the current 60% target would be replaced by the higher goal in the climate change bill. Miliband told MPs that the tough economic conditions were not an excuse to “row back” on the commitment to tackle …