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?
You can eliminate CO2 only by using a non-carbon fuel, say hydrogen -- burning hydrogen leaves water (and no CO2 of course). But as long as we use gasoline or diesel fuel or propane or natural gas, etc, we can not reduce CO2 without also losing power.
This isn't even about pollution. It's about "greenhouse gases". These nuts want California to lead the world in reducing emissions that they claim leads to global warming.