Assertion: smog's pollutant | /r/HasProperty | primary
Facets:
Source sentences:
text: Its primary pollutant is sulfur dioxide, a compound that causes acid rain.
text: Photochemical smog is an example of this, and is a secondary pollutant.
text: Photochemical smog depends on primary pollutants as well as the formation of secondary pollutants.
text: Key Points Photochemical smog is composed of primary and secondary pollutants.
text: Some pollutants may be both primary and secondary: they are both emitted directly and formed from other primary pollutants.
text: Furthermore, this smog depends on the primary pollutants and also on the formation of secondary pollutants.
text: Key Points Photochemical smog is composed of primary and secondary pollutants.
text: Some pollutants may be both primary and secondary: they are both emitted directly and formed from other primary pollutants.