Assertion: smog | /r/Synonym | ground-level ozone
Facets:
Source sentences:
text: The report covers the two main types of air pollution that plague the USA: smog (also known as ground-level ozone) and soot (technically known as "particulate matter").
text: Smog, or “ground-level ozone,” as it is more wonkily called, occurs when emissions from combusting fossil fuels react with sunlight.
text: Smog, also known as ground-level ozone, is harmful to human health, because it can exacerbate asthma attacks and cause difficulty breathing.