The Montreal Protocol on substances that deplete the ozone layer | Eighth edition

The Handbook is published shortly after the Protocol, along with the Vienna Convention, achieved universal participation, by 196 Parties, on 16 September 2009 – the first treaties of any kind in the history of the United Nations system to achieve that aspiration. The universal ratification of the Vienna Convention and the Montreal Protocol is the culmination of more than twenty-two years of efforts by the international community to ensure that the ozone protection treaties achieved global support and implementation.