"Superfreakonomics" on global warming

The sequel to the best-selling "Freakonomics" by Chicago economist Steve Levitt and journalist Stephen Dubner is about to hit the shelves. Their last chapter deals with global warming, and apparently a major storm has broken out in the blogosphere over their conclusion that more attention needs to be paid to geo-engineering as a solution. Levitt and Dubner's blog on the NYT website summarizes their conclusions. For a critique, check out Paul Krugman's blog on the same website.