Montreal Protocol on Substances that Deplete the Ozone Layer
The Vienna Convention on the Protection of the Ozone Layer
Signed in 1985, this treaty is the precursor to the Montreal Protocol.
The Montreal Protocol on Substances that Deplete the Ozone Layer
Adopted on September 16, 1987 and amended four times:
- London Amendment (1990)
- Copenhagen Amendment (1992)
- Montreal Amendment (1997)
- Beijing Amendment (1999)
The Ozone Secretariat is located at the United Nations Environment Program, http://ozone.unep.org/
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