Environmental Economics

I don't want to take all of the credit but were started this blog in the middle of last decade:

For six decades, Americans have tended to drive more every year. But in the middle of the last decade, the number of miles driven — both over all and per capita — began to drop, notes a report to be published on Tuesday by U.S. Pirg, a nonprofit advocacy organization.

People tend to drive less during recessions, since fewer people are working (and commuting), and most are looking for ways to save money. But Phineas Baxandall, an author of the report and senior analyst for U.S. Pirg, said the changes preceded the recent recession and appeared to be part of a structural shift that is largely rooted in changing demographics

via www.nytimes.com

And Tim's "drive less" mantra hit NPR in 2006.