There are some in Congress and many lobbyists that are arguing against raising the CAFE (Corporate Average Fleet Economy), the mpg minimums that auto manufactures have to average. The Chicago Tribune argues against raising CAFE. Here is my letter to the editor:

To the editor:

Today's editorial "All gassed up in the Senate" argues that the CAFE standards (Corporate Average Fuel economy) imposed by Congress have not achieved a reduction in overall gasoline usage. Assumptions like this are at best difficult to prove and most likely not a proper correlation. What is clear is that the price of gas has not yet risen to the point which would force us to significantly modify our driving habits. It would be better to ask the question, how much more gasoline would we be using without CAFE?

Fuel usage in our country is, as economists would say, semi-elastic. Price thus far has only had a minor effect on usage. Perhaps that is because we live in a culture that requires us to drive often and the price of gas has not yet become a significant factor in reducing "elective" driving; those extra, non-essential trips we take without considering the price of fuel.

It is true that fuel imports have nearly doubled since the CAFE laws were passed in 1975. However fuel usage and imports would be even higher if CAFE was not in effect. One loophole in the CAFE standards requires a much lower standard for SUV's, pick up trucks and other large vehicles, very popular until recently.

Fuel usage will only go down when the price of gas causes us to change our driving habits and higher CAFE standards ensure that we use less fuel than we would with lower standards. The current public discourse over energy, however, leaves me with hope.