The Earth’s protective ozone layer is showing signs of recovery, according to a report released Tuesday by the World Meteorological Organization (WMO). Data indicates the ozone hole observed in 2024 was smaller than in recent years. While some of the reduced ozone depletion in 2024 is attributed to natural atmospheric variations that cause annual fluctuations, the long-term positive trend reflects the efficacy of international collaborative efforts.
UN Secretary-General António Guterres lauded the progress, recalling the unified action taken four decades ago to safeguard the ozone layer. “Guided by science and united in action, nations came together to take the first steps in protecting the ozone layer” he stated. “The Vienna Convention and its Montreal Protocol have become a milestone of multilateral success”. He added that the ongoing recovery of the ozone layer serves as a powerful reminder of the potential for progress when nations heed scientific warnings.
The Montreal Protocol, instrumental in this recovery, has led to the cessation of over 99% of the production and consumption of ozone-depleting substances previously utilized in equipment such as refrigerators, air conditioners, fire extinguishers and aerosols. This has set the ozone layer on a path towards returning to levels seen in the 1980s by the middle of this century, significantly mitigating the risks of skin cancer, cataracts and ecosystem damage caused by excessive ultraviolet radiation. The WMO emphasizes the continued importance of monitoring progress and adhering to the commitments outlined in the Montreal Protocol.
