@failedLyndonLaRouchite @SeanCasten It just depends so much on where you are. If you're within a few hundred miles downwind of a coal plant, probably the coal plant is worse, but if you're further away, then many pollutants have time to wash out of the atmosphere.

Greenhouse gases like CO2 and methane stay in the atmosphere for a very long time, whereas most other pollutants are gone within days.