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
Beyond Protocol the community project "After Protocol" as open source continuation. In a 2008 GameSpy preview, Beyond Protocol was hailed for its "Customizable units; incredibly deep strategy; economic wheeling and dealing; player democracy", while noting concerns about balancing. Beyond Protocol Beyond Protocol was a subscription based Sci-Fi Massively multiplayer online real-time strategy game (MMORTS) Computer Game developed by the American independent game developer Dark Sky Entertainment and released in November 2008. The 3D game modelled a persistent and player-driven fictional galaxy. Beyond Protocol was an entirely Player versus player (PvP) game, no Non-player characters (NPCs) exist within the game, all activities (trade,