The New York Times has about as thorough a story on the last report from the Intergovernmental Panel on Climate Change as you can probably get without the reporter’s actually having read it. Despite my skepticism about the usefulness of getting scientists and diplomats to negotiate policy directions this way, there’s a striking number:
According to several authors, the final version estimates that bringing global carbon dioxide emissions by 2030 to levels measured in 2000 would require a cost on released carbon dioxide of $50 to $100 a ton, roughly on a par — in terms of fossil fuel prices — of an additional 25 cents to 50 cents for a gallon of gasoline.
Under the Canadian government’s plan, merely excess carbon dioxide will be going for $20 a (metric) tonne up until 2020. It certainly doesn’t get us where the IPCC thinks we need to be.