By Richard Lockhart in Edinburgh The world is heading for a 2.8°C rise in global warming by 2100 unless governments urgently improve their emissions targets, the UN warned, otherwise the window of opportunity to take the required climate action will slam shut. United Nations Secretary-General António Guterres said that the world faces a catastrophe if governments do not dramatically scale up their efforts to counter the climate crisis. He warned that the world’s failure to take climate change seriously enough means that the “rapid transformation of societies” was the option to limit the impact…