I commend everyone to this article by Ben Adler on American Prospect, which addresses a perpetually overlooked strategy to reduce oil use and combat global warming:

With all the focus on … “alternate energy programs,” too many [politicians] are ignoring a long-existing technology that, unlike, say, ethanol, already has the power to radically reduce our oil consumption. I’m speaking, of course, of mass transit.

This is a real problem. There are organized national constituencies for most environmental issues, but when it comes to public transit, there’s nothing.