The release of ozone-depleting substances (ODS) into the atmosphere reduces the ozone layer.
Ozone-Depleting Substances and Their Sources
Human activities that release ozone-depleting substances (ODS) significantly reduce the ozone layer. These ODSs are primarily responsible for the "ozone hole" over Antarctica. Common examples of ODSs include chlorofluorocarbons (CFCs), which were widely used in various applications until their harmful effects became widely understood.
- Refrigeration and Air Conditioning: CFCs were extensively used as refrigerants in refrigerators and air conditioners. Their release into the atmosphere through leaks and disposal significantly contributed to ozone depletion.
- Aerosol Propellants: CFCs also served as propellants in aerosol cans for various products. The widespread use of these aerosols released substantial amounts of CFCs into the atmosphere.
- Industrial Processes: Some industrial processes also used CFCs and other ODSs, contributing to atmospheric concentrations.
While the Montreal Protocol has significantly reduced the production and consumption of ODSs, the long atmospheric lifetime of these substances means that their effects on the ozone layer are still felt today. The continuing presence of ODSs in the atmosphere highlights the long-term impact of past human activities on the environment.
