Is the Gulf of Mexico disaster a reason to pass climate legislation – or is that legislation largely irrelevant to curbing our oil use? A Greenwire article Tuesday quoted a number of economists arguing that the leading proposals in Congress wouldn’t do much to change our dependence on petroleum.

The only reasonable response is “yes, of course.” Climate proposals such as Kerry-Lieberman, Cantwell-Collins, or Waxman-Markey will have limited effects on oil consumption for two reasons: first, they are market mechanisms; second, they are weak market mechanisms.

To start with the good news, reducing carbon emissions from electric utilities is cheaper than reducing oil use. Any market mechanism is supposed to prompt us to do the cheapest things first; that’s the whole point. There are many ways to make electricity with lower carbon emissions than a coal plant; putting a price on carbon makes those alternatives cheaper relative to coal. There are also many ways to promote energy efficiency, incrementally reducing electricity use.

For most Americans, on the other hand, there is only one way to make transportation, and it runs on oil. In the short run, with all of us driving the cars we now own, there is very little chance to change our gasoline use. In the closing words of one of the best satirical videos about the oil spill, “BP: You’re not mad enough to not drive your car.” (more…)