Assertion: smog's pollutant | /r/HasProperty | sulfur dioxide
Facets:
Source sentences:
text: Its primary pollutant is sulfur dioxide, a compound that causes acid rain.
text: Another pollutant associated with climate change is sulfur dioxide, a component of smog.
text: The main pollutants in industrial smog, however, are sulfur dioxide and fine particles of tar, soot and ash.