[VRM]

JT has some valid points.
Many of us in New England remember all the acid rain that used to fall here as a result of all the factories in places like Michigan and Ohio. I spent about 6 months in China a few years ago. They had no EPA to mandate any sort of clean air anything. The cities were smoggy, they smelled, and everything seemed to be a bit gray. I suspect that the west coast gets a lot of soot from all of the Chinese coal plants.

If everyone didn't drive for one day during the month that would drop our auto emissions by 3% (provided that all days have equal emissions levels - and they don't). That would drop our total emissions levels by about .75% (provided that the number supplied by Wes is correct). It's a start, but I suspect that there are more efficient ways to come up with bigger numbers.

Steve