Over at the Becker-Posner blog, the gentlemen consider the question, “Do National Security and Environmental Energy Policies Conflict?” (a topic also discussed here.)

Becker predicts, “Driven by environmental and security concerns, more extensive government intervention in the supply and demand for energy are to be expected during the next few years in all economically important countries. Policies that meet both these concerns are feasible, and clearly would have greater political support than the many approaches that advance one of these goals at the expense of the other.”

Posner observes the difference between a gasoline and a carbon tax, noting that the former would “have a direct effect in reducing demand for oil, thus reducing, as Becker points out, the oil revenues of oil-producing nations.”

But for a policy that addresses both national security and environmental concerns, “a gasoline tax would be inferior to a carbon tax from the standpoint of limiting global warming, because producers of oil, refiners of gasoline, and producers of cars and other products that burn fossil fuels would have no incentive to adopt processes that would reduce the amount of carbon dioxide emissions per barrel of oil, gallon of gasoline, etc. A carbon tax would create such an incentive and would also have a strong indirect negative effect on the demand for fossil fuels.”

There’s a lot more to these posts worth mulling over.