Weather-wise, Copenhagen is not an accommodating place for a “warmist”, as climate sceptics like to call most of the delegates. For a start it’s cold – it was a maximum of 6 degrees Celsius today and one wonders whether having a conference in a bleak, overheated, drought riven city – Adelaide, for instance – might have got the point across a little more clearly. And the statistics don’t help. Since a late November peak of 12 degrees, Copenhagen’s daily maximum’s have obstinately fallen, despite the country emitting an extra 2 million tonnes of CO2 into the atmosphere over that time. Proof, coolists could argue, that Copenhagen might be like one of those parties where the guest of honour – in this case global warming – failed to show. Or, maybe it’s winter. But if you cut a graph short enough, it’s possible to tell any story.