Assertion: ozone | /r/HasProperty | formed in the atmosphere
Facets:
value: from oxygen molecules
type: CAUSE
value: as a colorless gas
type: MANNER
value: naturally
type: MANNER
Source sentences:
text: Ozone is formed naturally in the atmosphere as a colorless gas having a very pungent odor.
text: Ozone is formed in the atmosphere when energetic ultraviolet (UV) radiation dissociates molecules of oxygen, O 2 , into separate oxygen atoms.
text: Ozone is formed in the atmosphere from oxygen molecules