Because the US's priority is emissions first fuel economy second, whereas every other country in the world, the priority is FE first.
Kinda wierd considering that a very fuel efficient car puts out far less greenhouse gases than a gas guzzler, even though they share the same smog standard. SO, if my car puts out an ounce of gases a year, and a gas guzzler puts 100 tons, AND if my car fails the test by .00001, and his passes by .00001, he wins, I lose. I would be the polluter and he'd be the "green guy".
Makes sense?
