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
1987 Montreal Alouettes season crowds in its final year. Consequently, the Winnipeg Blue Bombers moved to the East Division to balance out the divisions and played the Argonauts that day instead. The team never played a single game at Olympic Stadium in 1987; both of their preseason games prior to their folding were played on the road (their first preseason game was moved from Olympic Stadium to Canada Games Stadium in Saint John, New Brunswick). 1987 Montreal Alouettes season The 1987 Montreal Alouettes played two preseason games before folding on June 24, 1987, just one day before their scheduled Thursday game against the Toronto