Assertion: acid rain | /r/HasAspect | observable effect
Facets:
value: on human health
type: TRANSITIVE-OBJECT
Source sentences:
text: The findings were explosive: first, acid rain had not injured forests or crops in US or Canada; second, acid rain had no observable effect on human health; third, only a small number of lakes had been acidified by acid rain and these could be rehabilitated by adding lime to the water.