The Kigali Amendment (2016) extended controls to gradually reduce the production and consumption of hydrofluorocarbons (HFCs), as these substances have been adopted by industries to move away from ozone-depleting substances and are powerful greenhouse gases that harm the Earth`s climate. The Copenhagen Amendment (1992) Exit significantly accelerated the exit of the SDO and included, from 2004, an exit from the chlorofluorocarbon sector for industrialized countries. As part of this agreement, CFCs, halons, carbon tetrachloride and methyl chloroform were completely discharged into industrialized countries in 1996. In addition, methyl bromide bromide consumption was limited to its 1991 level. For more information on the release of the ODS, click here . September 16 will mark the anniversary of the signing of the Montreal Protocol on Ozone Depleting Substances, the pioneering international agreement to help build the ozone layer and protect our planet from harmful UV radiation. Learn more about World Oceans Day and the history of the Montreal Protocol and its implementation in the United States in this report. The provisions of the protocol stipulate that the parties to the protocol must base their future decisions on current scientific, environmental, technical and economic information, assessed by expert groups from the global communities of experts. To make this contribution to the decision-making process, progress in understanding these issues was assessed by the Scientific Assessment Panel (SAP) in 1989, 1991, 1994, 1998 and 2002.  The graphs provided by CSIRO Oceans and Atmospheric Research illustrate the overall observations of the impact of the Montreal Protocol on the content of ozone-depleting substances in the atmosphere and suggest the consequences for the future by 2050: chlorofluorocarbons, chlorofluorocarbons, commonly known as HCFC, are a group of human compounds containing 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. The Montreal Protocol on Ozone Depleting Substances is a 1987 international agreement. It was designed to stop the production and importation of ozone-depleting substances and reduce their concentration in the atmosphere to protect the planet`s ozone layer. In 1985, scientists Joe Farman, Brian Gardiner and Jon ShanKlin published results on abnormally low ozone concentrations over Halley Bay, near the South Pole.