Scientists have reported that the Earth’s ozone layer is healing faster than expected and could be fully restored by 2066.
The encouraging update was shared in the World Meteorological Organization’s (WMO) latest Ozone Bulletin, released to coincide with the 40th anniversary of the Vienna Convention.
According to the report, ozone loss over Antarctica has declined significantly in recent years, continuing a steady recovery trend observed over the past few decades. While natural atmospheric variations have played a small role, scientists say the main driver behind this rebound is the global ban on ozone-depleting chemicals, particularly chlorofluorocarbons (CFCs).
The ozone layer acts as a shield against harmful ultraviolet (UV) radiation. Without it, the planet would face increased risks of skin cancer, cataracts, immune system damage, and serious disruptions to ecosystems.
The turning point came with the Montreal Protocol of 1987, an international agreement signed by nearly 200 countries to phase out CFCs used in products like aerosols, refrigerators, and fire suppression systems. Thanks to that accord, scientists now predict that ozone levels will return to 1980 conditions by around 2040 in most regions, with the Antarctic ozone hole expected to close completely by 2066.
“This is no coincidence,” said WMO Secretary-General Celeste Saulo, crediting decades of global collaboration, open data sharing, and consistent atmospheric monitoring for making recovery possible.
Researchers also note that the healing of the ozone layer has contributed to progress on broader sustainability goals, including public health, climate action, food security, and biodiversity protection.
However, experts warn that the job isn’t done yet. “There remains an essential need for the world to continue careful monitoring,” emphasized Matt Tully, Chair of the WMO’s Scientific Advisory Group on Ozone and Solar UV Radiation.
