Zeotropic mixture harmful effects that hydrochlorofluorocarbons (HCFC) and chlorofluorocarbons (CFC) have on the ozone layer and global warming. Researchers have focused on using new mixtures that have the same properties as past refrigerants to phase out harmful halogenated substances, in accordance to the Montreal Protocol and Kyoto Protocol. For example, researchers found that zeotropic mixture R-404A can replace R-12, a CFC, in household refrigerators. However, there are some technical difficulties for using zeotropic mixtures. This includes leakages, as well as the high temperature glide associated with substances of different boiling points, though the temperature glide can be matched to the temperature difference
1987 Montreal Alouettes season 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 Argonauts. The many years of bad ownership and dwindling fan support finally led to the CFL pulling the plug on the franchise and folding them. Since Sam Berger sold the team in 1981, it had shaky ownership and years of poor football performances, only playing .500 ball once (in 1985) and making the playoffs twice (winning only one game in 1985), leading to it playing in a to near-empty Olympic Stadium