CO2, the stuff that has been buried for millions of years, and we're releasing all at once into the atmosphere? The stuff that is warming our planet faster than we, or nature, can adapt to? The stuff that is worsening global wildfires, flooding, retreating glaciers, heat waves, desertification, etc.?
Yeah, that stuff. And other nasty things in the exhaust as well.
The global problem of CO2 is something separate than the hyper local "problem" of CO2.
The "other stuff" is lower than the emissions in cars "other stuff".
If you are rallying behind "Natural gas generators are poisoning our town" you are 100% guaranteed to look dumb upon any rational analyses. Its a bad angle and should be abandoned. Go after noise if anything.