General
Surge in ozone-depleting CFCs appears to have been reversed, ozone layer recovery back on track
The global increase in ozone-depleting chlorofluorocarbon-11 (CFC-11) emissions, which was first detected in 2013 and continued to rise in the following years, appears to have been halted.
Key points:
- A mystery surge in CFC-11 was detected between 2014-17
- The source of 60 per cent was traced to China, but 40 per cent is still unknown
- CFC emissions have returned to normal and researchers believe restoration of the ozone layer is still on track
Data from monitoring stations in South Korea (AGAGE station), Japan (NIES), and Hawaii (NOAA), showed that global CFC-11 emissions began dropping in 2019, after inexplicably surging between 2014-17, according to two research papers published in Nature today.
And preliminary data from late 2019 and early…
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