Quote:
Originally Posted by oil pan 4
All I know is California has the strictest air regulations in the country.
But when you look up America heart and lung associations list of "cities with the worst air quality" the top 5 or 6 are in California.
|
Correlation =/ Causation
They have the strictest regulations because they NEED the strictest regulations. Pollution gets trapped and doesn't disperse as easily as in other areas vs California.
OP:
Evaporative emissions have to do with controlling gas fume leakage from gas tanks. As far as I know, new cars all have EVAP canisters to collect fumes and prevent venting to atmosphere, but other things such as motorcycles and small engines don't necessarily have these EVAP canisters. A California emissions model would have an EVAP canister.