[Big Dave]

If you want Euro-style high MPG cars, the US has to do two things:

1) Go back to the engine emiossion standards in place in 2000.
2) Change crash test standards to give smaller cars made by common techniques and of reasonably-priced material (read: other than carbon fiber) cars a chance to pass.

The first part is logical. Air quality is the best its been in the US since Jamestown was established. It has not noticeably improved since 2000.

Did the WHO (aren't they part of the UN?) tell us a what concentration diesel soot is carcinogenic, or is this another "zero tolerance" factoid?