Montreal Protocol (1973) and the international agreement signed (1985 & 1987). The treaty is structured around several groups of halogenated hydrocarbons that deplete stratospheric ozone. All of the ozone depleting substances controlled by the Montreal Protocol contain either chlorine or bromine (substances containing only fluorine do not harm the ozone layer). Some ozone-depleting substances (ODSs) are not yet controlled by the Montreal Protocol, including nitrous oxide (N2O) For a table of ozone-depleting substances controlled by the Montreal Protocol see: For each group of ODSs, the treaty provides a timetable on which the production of those substances must be shot out and eventually
Montreal Economic Institute Montreal Economic Institute The Montreal Economic Institute (MEI) is a non-profit research organization (or think tank) based in Montreal, Quebec, Canada. It aims at promoting economic liberalism through economic education of the general public and what it regards as efficient public policies in Quebec and Canada through studies and conferences. Its research areas include different topics such as health care, education, taxation, labour, agriculture and the environment. Its studies are often mentioned in the media. The MEI was incorporated in July 1987, after being created by a group of Québec intellectuals and businessmen as the continuation of the Institut économique