Since 23 June 2015, all countries of the United Nations, the Cook Islands, the Holy See, Niue and the European Union have ratified the original Montreal Protocol (see external link below) , with South Sudan being the last country to ratify the agreement, bringing the total to 197. These countries also ratified the london, Copenhagen, Montreal and Beijing amendments.  Few details of the USMCA were published, but a memo from the House Ways and Means Committee, which lists democratic “benefits” in the agreement announced yesterday, established that negotiators had “removed the language in order to include the Montreal Protocol in this agreement.” Canada was one of the first countries to ratify the Montreal Protocol in 1987, a landmark international agreement that eliminated more than 99% of the substances that reduced the planet`s protective ozone layer. 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 carried out by four implementation agencies that have entered into contractual agreements with the Executive Committee: Since the Montreal Protocol came into force, atmospheric concentrations of major chlorofluorocarbons and associated fluorinated hydrocarbons have flattened or reduced.  Halon concentrations have continued to increase due to the release of halons currently stored in fire extinguishers, but their rate of increase has slowed and their frequency is expected to decrease by about 2020. The concentration of HCFCs has also increased drastically, at least in part, as many uses (for example. B as a solvent or refrigerant) replaced HCFCs with HCFCs. Although there have been reports of attempts by individuals to circumvent the ban. B, for example by smuggling undeveloped CFCs to industrialized countries, the overall level of compliance was high. The 2010 statistical analysis shows a clear positive signal from the Montreal Protocol to stratospheric ozone.
 As a result, the Montreal Protocol has often been described as the most successful international environmental agreement to date. In a 2001 report, NASA found that ozone dilution over Antarctica had remained the same thickness over the past three years, but in 2003, the hole in the ozone layer grew to its second largest size.  In the latest scientific assessment of the impact of the Montreal Protocol (2006), it states: “The Montreal Protocol works: there are clear signs of reduced atmospheric exposure to ozone-depleting substances and some early signs of stratospheric ozone recovery.”  However, a recent study suggests a relative increase in CFCs due to an unknown source.  The removal of the language of the Montreal Protocol from an earlier version of the USMCA is part of a broader effort by democratic negotiators to improve the applicability of existing multilateral environmental agreements in the North American trade agreement. This initiative was finally successful, according to the memo released yesterday, which states that the agreement now contains commitments that all parties “adopt, apply and maintain, and additional language allowing all parties to add to the list of covered MEEs.” The treaties are also remarkable in the unique utility of global action, with only 14 years signed between a fundamental scientific discovery (1973) and the international agreement (1985 and 1987).