Don't the CERN cloud formation results strongly suggest that empirical models such as Lean and Rind's 2009 multiple regression make better short-term candidates for setting targets in policy formation, at least until we know more?
Note that the high empirical value derived for the cooling effect of sulphate aerosols in L & R 2009 is consistent with the CERN results -- and troubling for those committed to the IPCC consensus ideas on GHG emissions reduction priorities.
Assuming they read it, of course.
One big difference between the policy world and the world of natural scientists is that policy people, especially economic policy people, go on making old arguments long after the empirical evidence has overtaken the argument.
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