The Montreal Protocol is widely regarded as the most successful agreement on environmental protection. It contains a binding timetable for the abandonment of ozone-depleting substances. This schedule has been regularly reviewed, accelerating release dates, in accordance with scientific understanding and technological advances. In 1985, 20 nations, including most major producers of CFCs, signed the Vienna Convention, which set out a framework for negotiating international rules on ozone-depleting substances.  Following the discovery of the hole in the ozone layer by SAGE 2, it took only 18 months for a binding agreement to be reached in Montreal, Canada. As a result of the international agreement, the hole in the Antarctic ozone layer is slowly recovering.  Climate forecasts indicate that the ozone layer will return to its 1980 level between 2050 and 2070.    The success of the Montreal Protocol is attributed to its effective burden-sharing and solution proposals, which have helped to mitigate regional conflicts of interest in relation to the inadequacies of the overall regulatory approach to the Kyoto Protocol.  However, global regulation was put in place before a scientific consensus was reached, and public opinion was convinced of the potential risks associated with the ozone layer.  The parties to the Montreal Protocol, at their 28th meeting in Kigali, Rwanda, on October 15, 2016, agreed to phase out CFCs.
Countries agreed to include HECs in the list of controlled substances and approved a phased reduction schedule of 80-85% by the end of the 2040s. The first reductions by industrialized countries are expected in 2019. Developing countries will see a freeze on CFC consumption for some countries in 2024 and 2028. Given all these factors, and more, the Montreal Protocol is considered one of the most successful environmental agreements of all time. What the parties to the protocol have accomplished since 1987 is unprecedented and remains an inspiring example of what international cooperation can achieve in its best form. The Fund is managed by an executive committee similarly representing seven industrialized countries and seven Article 5 countries, elected each year by a meeting of the parties. Each year, the committee reports on its activities at the parties` meeting. The Multilateral Fund`s work on the ground in developing countries is being led by four implementation agencies that have entered into contractual agreements with the Executive Committee: The damage to the world`s protective ozone layer has raised unprecedented concerns and actions around the world. Since the 1987 international agreement on the phasing out of ozone-depleting substances, 197 countries have ratified the Montreal Protocol. In January 2012, South Sudan ratified the Montreal Protocol, making it the first international environmental treaty to be fully ratified – a truly remarkable effort that reflects the overall acceptance and success of the agreement.