The depletion of the ozone layer has been primarily linked to synthetic chemicals like chlorofluorocarbons (CFCs), which were historically used as refrigerants and in fire extinguishers.
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The depletion of the ozone layer has been primarily linked to synthetic chemicals like chlorofluorocarbons (CFCs), which were historically used as refrigerants and in fire extinguishers.
The depletion of the ozone layer is primarily attributed to human-made chemicals known as ozone-depleting substances (ODS), with chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and methyl chloroform being key culprits. These substances release reactive chlorine and bromine atoms when they reach the stratosphere, where the ozone layer is located. The released atoms catalytically destroy ozone molecules, leading to a thinning of the ozone layer. The widespread use of ODS in products like refrigerants, solvents, and aerosol propellants surged in the mid-20th century before the scientific community recognized their detrimental effects. International efforts, such as the Montreal Protocol adopted in 1987, have successfully phased out many ODS, leading to a gradual recovery of the ozone layer. However, the persistence of some ODS and emerging threats from substitutes highlight the ongoing need for global cooperation in safeguarding the ozone layer and mitigating potential environmental and health risks.