The Montreal Protocol on Ozone Depleting Substances is a global agreement to protect the world`s ozone layer by depleting the chemicals that deplete them. This operating plan covers both the production and consumption of ozone-depleting substances. The pioneering agreement was signed in 1987 and came into force in 1989. The Global Alliance of Nations for the Protection of the Ozone Layer is the most effective measure to prevent the depletion of the ozone layer over Australia. Australia accounts for less than one per cent of global emissions of ozone-depleting substances. Promoting and supporting other countries through our participation in the Montreal Protocol is the best way to reduce ozone depletion. Australia remains one of the first countries to ratify the Montreal Protocol for the phase-out phase-out of ozone-depleting substances. In many cases, Australia is well ahead of the requirements of the Montreal Protocol. Australia`s approach is based on a cooperative partnership between industry, the community and all levels of government. As a result of the measures taken under the Montreal Protocol, ODS emissions are decreasing and the ozone layer is expected to be fully healed by the middle of the 21st century. For more information on the current state of the ozone layer, click here HCFCs are transitional HCFC substitutes used as refrigerants, solvents, thrusters for the manufacture of plastic foam and fire extinguishers. With respect to the potential for ozone depletion (ODP), these HFC codes are lower than those of CFCs with ODP 0.6 – 1.0 (0.01 – 0.5).
In terms of global warming potential (GWP), the potential for HFC (GWP) is lower than that of CFCs with a potential of 4,680 to 10,720 GWP (76 – 2,270). This page summarizes the history of international cooperation in the protection of the ozone layer, including: the Vienna Convention; The Montreal Protocol; Changes to the Montreal Protocol in the past; United Nations Secretariat (UNEP) funded by the environment. Chlorofluorocarbons, commonly known as HCFCs, are a group of human compounds that contain hydrogen, chlorine, fluorine and carbon. They are not found anywhere in nature. Production of HCFCs began after countries agreed in the 1980s to end the use of CFCs that destroyed the ozone layer. Like CFCs, HCFCs are used for cold, aerosol fuels, foam production and air conditioning. However, unlike CFCs, most HCFCs are degraded in the lowest part of the atmosphere and pose a much lower risk to the ozone layer. Nevertheless, despite their very low atmospheric concentrations, measured in part by a trillion (million million), HCFCs are very powerful greenhouse gases.
Fluoridated hydrocarbons (HCFCs) are gases used worldwide for refrigeration, air conditioning and foam applications, but they will flow under the Montreal Protocol since the depletion of the ozone layer. HCFCs are both ODS and potent greenhouse gases: the most widely used HCFC is almost 2000 times more potent than carbon dioxide compared to its overall distortion potential (GWP). Recognizing the potential benefits to the planet`s climate, the parties decided in September 2007 to accelerate their timetable for the gradual reduction of HCFCs.