-
In the 1970s, CFCs ozone-depleting particles were discovered. USA and Sweden banned them from non-essential aerosol uses in 1974.
-
British Antarctic Survey reports the ozone hole. 20 nations including major CFC producers signed the "Vienna Convention" which set international regulations on how to deal with ozone-depleting substances.
-
Organised by the United Nations, with over 30 countries agreeing to cut their CFC emissions by half by 2000.
-
-
Strengthening of the protocol and alterations. Industrialised countries would eliminate CFC production by 2000 and developing countries by 2010.
-
Speed up the phasing out of ozone-depleting substances.
-
Nobel Prize on chemistry awarded to Molina, Sherwood Rowland and Crutzen for their work on solving ozone-depletion issue.
-
NASA and NOAAA record this.
-
