The clouds of unknowing

The March 20th, 2010 edition of the Economist magazine gives a briefing on The science of climate change. They cover the uncertainties of the IPCC modeling but conclude:

" The fact that the uncertainties allow you to construct a relatively benign future does not allow you to ignore futures in which climate change is large, and in some of which is very dangerous indeed. The doubters are right that uncertainties are rife in climate science. They are wrong when they present that as a reason for inaction."