If enforced, what it means is smaller cars with less power -- there is no other way to reduce CO while using gasoline.
I didn't think there was any way to reduce it. Isn't CO2 a direct result of combustion?
If so, how can it be reduced, short of lessening the combustion, which implies, as you suggest, smaller motors, i.e. smaller explosions in smaller combustion chambers.
Pretty harsh measure, since it appears that mankind's effect on global warming is minimal, anyway.
Perhaps the automakers can comply w/ this by marketing only their smallest cars in CA. Am I right that most of the problems with pollution are centered in LA, with its frequent temperature inversions?