Reuters: Britain has committed itself to the most ambitious greenhouse gas emissions cuts in the world. Energy and Climate Minister Ed Miliband says the Government is raising its target from a 60 per cent cut to 80 per cent by the year 2050. Mr Miliband says the global financial crisis should not be used as a justification to shelve climate change initiatives. “In tough economic times, some people will ask whether we should retreat from our climate change objectives,” he …