Assertion: smog's ozone | /r/HasProperty | main component
Facets:
value: in cities
type: LOCATION
value: in this type of air pollution
type: OTHER
Source sentences:
text: Ozone is the main component in this type of air pollution.
text: Ozone, the main ingredient in smog, is formed when two pollutants (nitrogen oxides and volatile organic compounds) combine in the presence of sun light with other atmospheric substances close to the ground.
text: The researchers studied 13 air purifiers known to give off small and large amounts of ozone, a major ingredient in air pollution.
text: Ozone, a gas, is a major part of air pollution in cities.