Ozone loss was a thing even before CFCs were widely used

A study analyzing historical ozone data found evidence of ozone depletion occurring in the 1950s, before chlorofluorocarbons (CFCs) became widely used. Researchers examined atmospheric records from that period and determined that contemporary measurement technology could have detected the phenomenon at that time. The findings suggest ozone loss had begun earlier than previously documented, though scientists note that CFC emissions became the dominant driver of ozone depletion in subsequent decades. The research adds context to the timeline of atmospheric change but does not alter the established understanding that CFCs were the primary cause of severe ozone depletion observed from the 1970s onward.

Next story