Chronology of Ozone Depletion
1881
Discovery
of ozone layer in stratosphere
Discovery
of ozone layer in stratosphere1928Synthesis
of CFCÕs for use as a refrigerant
Synthesis
of CFCÕs for use as a refrigerant1950sRapid
increase in use of CFCÕs
Rapid
increase in use of CFCÕs1974Description
of ozone loss chemical reactions
Description
of ozone loss chemical reactions1979Ban
of CFC use in most aerosol cans in U.S.
Ban
of CFC use in most aerosol cans in U.S.1980sGrowth
of CFC use worldwide
Growth
of CFC use worldwide1985Discovery
of Antarctic ozone hole
Discovery
of Antarctic ozone hole1987Adoption
of Montreal Protocol calling for a 50% reduction in use of
CFCÕs by 1998
Adoption
of Montreal Protocol calling for a 50% reduction in use of
CFCÕs by 1998