Technological and industrial history of 20th-century Canada the Keele Valley Landfill was operated by the City of Toronto from 1983 until 2002, when it was closed because it was full. Chlorofluorocarbons (CFCs), the gas propellants used in aerosol spray cans, became a target for environmental concern in the 1970s and 1980s when research demonstrated that they had a harmful effect on the ozone layer in the atmosphere. The international Montreal Protocol of 1989 banned the use of these substances and they were subsequently replaced with volatile hydrocarbons. The problem with choice to reuse is still not available. There are many products that don't need to be recycled
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