Assertion: ozone | /r/HasProperty | the air
Facets:
Source sentences:
text: Though ozone in the stratosphere is protective, ozone in the atmosphere - which is the air we breathe - can be harmful to the respiratory system.
text: Ozone Generators produce Ozone out of Oxygen (either air or concentrated Oxygen) and, as such, there are no on-going costs for chemicals or other inputs into Ozone Generators other than electricity.