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The World Meteorological Organization (WMO) has announced that the Earth’s ozone layer is on track for recovery by the middle of this century, marking a significant victory for global environmental efforts. This development, highlighted in a bulletin released on September 16, underscores the effectiveness of international cooperation in addressing climate challenges.
The report details the substantial reduction of ozone-depleting chemicals, a change attributed to the 1987 Montreal Protocol, which aimed to phase out substances used in refrigeration, air conditioning, and aerosol sprays. This treaty has successfully led to the elimination of over 99 percent of controlled ozone-depleting chemicals, contributing to the healing of the ozone layer.
The WMO’s findings indicate a notable decrease in the size of the Antarctic ozone hole, which was reported to be smaller in 2024 compared to recent years. On September 29, the maximum ozone mass deficit measured 46.1 million tonnes, falling below the 1990–2020 average. The report also noted a slower onset of depletion this year, suggesting early signs of recovery.
Long-term projections estimate that if current policies remain in place, the ozone layer could return to its 1980 levels by around 2066 over Antarctica, 2045 over the Arctic, and 2040 for the rest of the world. While fluctuations in ozone levels may continue annually, the overall trend indicates a positive trajectory due to sustained international efforts.
The WMO emphasizes that this success serves as a model for addressing other global climate challenges, illustrating that coordinated action based on scientific guidance can lead to meaningful progress in environmental protection.
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