Fluorinated gases pharmaceutical industries, as well as in refrigeration when combined with other gases. PFCs were commonly used as fire extinguishants in the past and are still found in older fire protection systems. They are also a by-product of the aluminium smelting process. Sulphur hexafluoride (SF) is used primarily as an insulation gas. It can be found in high-voltage switchgear and is used in the production of magnesium. HFCs were developed in the 1990s to substitute substances such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). As these substances were found to deplete the ozone layer, the Montreal Protocol lays down provisions for them
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