BBC: Does the failure of December’s UN climate conference mean the world needs a completely new approach to tackling climate change? It does, a group of academics is arguing this week – and one of them, Mike Hulme, explains why, and what it is that they are recommending. The gap between the pre-Copenhagen rhetoric of "what must be done to stop climate change" and the reality of the Copenhagen Accord outcome was spectacular. No agreement of much consequence was reached, and the very …