Assertion: smog's component | /r/HasProperty | ground-level ozone
Facets:
Source sentences:
text: Smog is made up of many chemicals including nitrogen oxides (NOx), sulphur dioxide (SOx), carbon monoxide (CO), and volatile organic compounds (VOCs), but the two main components of smog are particulate matter (PM) and ground-level ozone (O 3 ).
text: An important component of smog is ground-level ozone.
text: The most harmful components of smog are ground-level ozone and fine airborne particles.