Assertion: nitrogen dioxide | /r/HasProperty | important air pollutant
Facets:
Source sentences:
text: Nitrogen dioxide is an important air pollutant because it contributes to the formation of photochemical smog, which can have significant impacts on human health.
text: Nitrogen dioxide is an important air pollutant because it contributes to the formation of photochemical smog, which can have significant impacts on human health.
text: Nitrogen dioxide is an important air pollutant because it contributes to the formation of photochemical smog, something which may have a notable impact on human health.