Ozone
Hole

Observation data analysis involves the analysis of data collected using technology, which provides accurate information about Earth-threatening phenomena. Satellite technology allows us to observe changes in the ozone layer from the 1970s to 2020. The data shows that the ozone layer depleted from 1.10x10 km in 1979 to 29.90x10 km in 2000, nearly 30 times the depletion in just 30 years.

 

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Efforts were made globally to reduce the use of ozone-depleting substances such as Chlorofluorocarbons (CFCs) and Hydrochlorofluorocarbons (HCFCs), and the Montreal Protocol was signed in 1987 by 197 countries to address this issue. As a result, global ozone depletion was reduced by more than 99% after manufacturers replaced these substances with less harmful alternatives in 1989.