Assertion: ammonia's effect | /r/CapableOf | become apparent
Facets:
value: in 1980
type: TEMPORAL
Source sentences:
text: In 1980’s the harmful effects of CFC refrigerants became apparent and it was generally accepted that the CFC refrigerants are contributing to depletion of ozone layer and to global warming, finally resulting in Montreal protocol (1989) where almost all countries agreed to phase out CFC’s in a time bound program.