Assertion: smog's pollutant | /r/Causes | smog
Facets:
Source sentences:
text: The pollutants that cause smog to form can come from many sources including power plants, vehicle exhausts, factories, and countless consumer products.
text: Rain can clear the air of the pollutants that cause the smog but at the same time this also creates acid rain including sleet, hail and snow that is acidic (Britannica, 2000).