Ozone Layer Recovery Continues, Despite Remaining Threats

The World Meteorological Organization (WMO) has released its Ozone Bulletin, highlighting the ongoing recovery of the ozone layer. According to the report, the 2025 Antarctic ozone hole was one of the smallest in recent decades, a testament to the success of international efforts to protect the ozone layer. The WMO attributes this progress to the Montreal Protocol, which phased out ozone-depleting substances. However, the report also notes that UV radiation remains a threat to health, with measurements showing a significant increase in the number of days with high UV index values. This trend is driven primarily by a reduction in cloud cover and an accompanying increase in annual sunshine duration. The WMO emphasizes the importance of targeted and effective UV protection measures to mitigate this risk. The Ozone Bulletin was released on World Ozone Day, which celebrates the Montreal Protocol's success in phasing out ozone-depleting substances. The report also highlights the need for continued atmospheric monitoring to support regulatory actions and ensure the long-term recovery of the ozone layer.