Note that the above is not talking about CO2. Pollutants other than CO2 are typically heavily regulated for on-road vehicles and power generation, and they have expensive systems that prevent a very significant amount of those pollutants from being emitted.

For example, your cars catalyst prevents a lot of pollutants from being emitted -- but your lawnmower doesn't have this device at all.

CO2 is a different story all together -- because it's the primary byproduct.