At Copenhagen, Nicholas Stern admits his 2006 Stern Report underestimated the gravity of the problem – not so much the economics of it, or in terms of the more recent data coming in, but the stunning lack of political response:
“Do the politicians understand just how difficult it could be? Just how devastating 4, 5, 6 degrees centigrade would be? I think not yet. Looking back, the Stern review underestimated the risks and underestimated the damage from inaction.â€