3 ms·
The two big ones I know about are sulfur dioxide (https://en.wikipedia.org/wiki/Sulfur_dioxide#As_an_air_pollutant https://en.wikipedia.org/wiki/Sulfur_dioxide#
by hga 11y ago
The two big ones I know about are sulfur dioxide (https://en.wikipedia.org/wiki/Sulfur_dioxide#As_an_air_pollutant https://en.wikipedia.org/wiki/Sulfur_dioxide#As_an_air_pollu...) and fly ash (https://en.wikipedia.org/wiki/Fly_ash https://en.wikipedia.org/wiki/Fly_ash).