Estimating costs for climate change mitigation: which uncertainty matters most?

A paper in the latest Nature generated distributions of the cost estimates, talking into account four types of uncertainties: geophysical, technological, social and political.  They found that political choices have the largest effect, followed by geophysical uncertainties, social factors and lastly by technological uncertainties. 

My CSIRO colleague Steve Hatfield-Doddes wrote a very nice review about the paper called "Climate change: All in the timing" in the same issue.