Montreal Protocol
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The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into force on 1... Wikipedia
Condition: Ratification by 20 states
Effective: 1 January 1989 if 11 states have ratified by then
Languages: Arabic, Chinese, English, French, Russian, and Spanish
Location: Montreal
Ratifiers: 198 (all United Nations members, as well as the Cook Islands, Niue, the Holy See, and the European Union)
Signed: 16 September 1987
Signatories: 46
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