Compounds with the factors carbon, hydrogen, chlorine, and fluorine are referred to as HCFCs. Some of the substances in this class are considered by business and academia to be temporary substitutes for chlorofluorocarbons. Because they release less reactive chlorine into the stratosphere, where the “ozone layer” is present, HCFCs have shorter atmospheric lifetimes than CFCs. As a result, it is anticipated that these substances will have a far smaller impact on the stratospheric ozone depletion than CFCs. They are only seen as temporary substitutes for the CFCs since they still contain chlorine and have the potential to harm stratospheric ozone.
How have HCFC levels in the atmosphere evolved throughout time?
Hydrochlorofluorocarbon (HCFC) Regular, exact measurements of the air in far-off places reveal that HCFC concentrations have been rising quickly over time globally. Beginning in the late 1980s and early 1990s, increased usage of HCFCs as CFC replacements and other chemicals as solvent/cleaning agents, refrigerants, foam-blowing agents, air conditioning fluids, etc. is responsible for this rise. Scientists from NOAA, CSIRO (Australia), and the University of East Anglia (UK) have been able to reconstruct how concentrations of these gases have changed in the atmosphere over the past 100 years through measurements of air stored in containers that were originally filled as early as 1977 and measurements of even older air trapped in snow above Antarctica.