Guardian: The UK government must set a 2050 target of cutting all greenhouse gas emissions by at least 80%, according to its own climate watchdog. Lord Turner, chair of the independent Climate Change Committee, said the power sector must almost totally decarbonise by 2030 to achieve this 2050 target. Politicians, scientists and campaigners alike have welcomed the report, but the electricity producers called the target “ambitious” and stressed the need for a new generation of nuclear …