And I believe I've said this before, but since you don't attach a name to your misinformation, who knows.
Smog is the result of a chemical reaction with sunlight and volatile organics. Particulates do provide a reaction site, but are not the cause of smog.
Particulates are a form of pollution, and do cause human harm, but they are not the cause of the brown clouds that used to hang over US cities. Smog levels have very clearly dropped in the US as vehicles have become more efficient, particularly as catalytic converters and fuel injection became commonplace. As vehicles produce even less hydrocarbon and acidic emissions, health outcomes will improve.
If you think that a 20% increase in vehicle weight is going to create as much pollution as using continuous chemical explosions for power, then I'm going to say you have some sort of vested interest in oil futures.