Assertion: level ozone | /r/HasProperty | major component of smog
Facets:
Source sentences:
text: Ground-level ozone is considered to be a major component of smog which plagues larger cities during the summertime and has been tied to a variety of potential health risks.
text: When weather forecasts indicate ground-level ozone (the main component of smog) could reach an unhealthy level, environmental agencies will call an Ozone Action Day.
text: The Ozone Annex was added to the Canada-United States Air Quality Agreement (December 2000) to address the transboundary air pollution leading to high levels of ground-level ozone, a major component of smog.