WMO Reports Ozone Hole Shrinking Over the Past Year

The World Meteorological Organization (WMO) announced Tuesday in Geneva that the ozone hole has shrunk over the past year compared to previous decades, citing favorable natural conditions and continued international cooperation as key factors.

According to Swiss broadcaster Lac Radio, the WMO confirmed that the ozone layer could return to 1980s levels by around 2040 or by the mid-2060s, depending on the region. 

This recovery would significantly reduce cases of skin cancer and protect ecosystems from harmful ultraviolet (UV) radiation.

The agency urged the international community to maintain its efforts, stressing that restoring the ozone layer supports progress on several Sustainable Development Goals (SDGs), including those related to health, climate, and food security.

Last year, the ozone deficit over Antarctica peaked at just over 46 million tonnes in late September, below the 30-year average and smaller than in the previous four years. 

Encouragingly, the onset of ozone loss was delayed, and recovery occurred more quickly than usual.

Speaking on the occasion of World Ozone Day, UN Secretary-General António Guterres reflected: “Forty years ago, nations came together to take the first steps to protect the ozone layer. Today, it is recovering, reminding us that when countries heed scientific warnings, real progress is possible.”

The WMO highlighted the success of the Montreal Protocol, which phased out more than 99% of controlled ozone-depleting substances once widely used in refrigeration, air conditioning, fire extinguishing foams, and aerosols.

In addition, 164 countries have ratified an amendment to curb hydrofluorocarbons (HFCs), chemicals introduced as replacements for ozone-depleting substances. 

The planned reduction is on track and could help limit global warming by up to 0.5°C by 2100.