They've always been looser than ours. That's a key reason why a number of British and European car companies (MG, Morris, Austin Healey, Morgan, Lotus, Renault, Fiat, etc., etc.) stopped selling cars here when the regs got tight. A few left and then came back. Morgan came back with a propane-fueled Oldsmobile V8.
As for people dropping dead, they actually have put numbers on it. As much as you love statistics you really should go to PubMed and read a few of the study abstracts. They're pretty interesting.
Oh, that's a swell idea, George. Then we can all commute 200 miles to work! d8-)
Hey, hey! I want a credit! Give the other guy the surcharge...
Uh, the huge tax subsidies go to New Mexico, Mississippi, North Dakota and West Virginia. The "high-population-density urban areas" receive the lowest subsidies in the country.
Take a look at this map, page 2:
Both the US standards and the European standards are being tightened up. Particulate filters are solving most of the problem.
-- Ed Huntress