Assertion: ozone | /r/HasProperty | helpful
Facets:
value: in the upper atmosphere
type: LOCATION
value: from a human perspective
type: OTHER
Source sentences:
text: From a human perspective, ozone is both helpful and harmful, both good and bad.
text: While ozone is helpful in the upper atmosphere (filtering out UV light rays), in lower atmosphere, or in buildings, it is an air pollutant that is harmful to humans and other animals, and a gas that can oxidize or "burn" plants or various materials found indoors.
text: Ozone is technically a greenhouse gas, but ozone is helpful or harmful depending on where it is found in the earth's atmosphere.
text: Ozone can be both helpful and harmful, depending on where it is found in the atmosphere.