A very interesting couple of blog posts in the New York Times here and the follow up here.
On first impressions this seems like a very sensible plan. It still taxes carbon but only if we start recording warming point forwards. If the sceptics are right and man’s influence is irrelevant then we don’t pay any tax. However if warming is recorded an (what seems to be) exponential tax rate kicks in. There are fair criticisms of the scheme but most are answered pretty well by Dr McKitrick.