Assertion: air pollution | /r/HasProperty | classified earth's many ecosystems
Facets:
value: as a danger to human health
type: TRANSITIVE-OBJECT
value: for a long time
type: TEMPORAL
Source sentences:
text: Air pollution has been classified as a danger to human health and Earth's many ecosystems for a long time.
text: Air pollution has been classified as a danger to human health and Earth 's many ecosystems for a long time.