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🌍 World Ozone Day 2025 Ozone Layer on Track to Recover by Mid-Century 🔑 Key Highlights from the WMO Ozone Bulletin 2024 The ozone layer is expected to return to 1980s levels by the middle of this century . The 2024 Antarctic ozone hole was smaller compared to recent years, peaking at 46.1 million tonnes on September 29. Lower depletion this year was partly due to natural atmospheric conditions , but long-term recovery reflects the success of global action . 📜 40 Years of Global Cooperation This year’s bulletin was released on World Ozone Day , which also marks the 40th anniversary of the Vienna Convention , the first global treaty dedicated to protecting the ozone layer. Antonio Guterres, UN Secretary-General : “Forty years ago, nations came together, guided by science and united in action. Today, the ozone layer is healing. This reminds us that when nations heed scientific warnings, progress is possible.” The Montreal Protocol , born from the ...