Still driving two cars? Kate Sheppard at Gristmill, reporting on Congressional testimony before the House Select Committee for Energy Independence and Global Warming, cites a compelling reason why pairing down to one is in your best interest (not to mention the environment's):
Goldberg and Winkleman spoke to the virtues of promoting denser, better-planned cities with good mass transit and pedestrian-friendly design. Goldberg noted that families in areas where you can get by with one or no car save an average of $6,000 a year, not to mention reducing their personal emissions.