NY Times Nocera vs. James Hansen on Keystone

Joe Nocera is having an important debate with James Hansen.   Nocera celebrates Hansen as a pioneer climate scientist and as a good economist.  Hansen demands a carbon tax now.   All economists agree with adopting this efficient policy.  As I write in Climatopolis, I’m a supporter of $10 gasoline now.    Where Nocera and Hansen part company is on Hansen’s doomsday rhetoric about the consequences of the President giving the green light to the Keystone Pipeline.   Below the fold, I discuss some nuanced issues.

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