Story perspectives

Ozone Layer Healing: Global Efforts Pay Off!

9/16/2025

Summary

Story summary

The UN reports the Earth's ozone layer is healing, with a smaller Antarctic ozone hole in 2024.
UN Secretary-General António Guterres credited global cooperation for this progress, coinciding with World Ozone Day and the Vienna Convention's 40th anniversary.
The Montreal Protocol has eliminated over 99% of ozone-depleting substances.
The ozone layer is projected to return to 1980 levels by mid-century, lowering skin cancer and ecosystem damage risks.
The 2023 ozone mass deficit was 46.1 million tonnes, below the 1990-2020 average, highlighting the need for ongoing monitoring.

History

Historical Context

The Montreal Protocol, established in 1987, successfully phased out over 99% of ozone-depleting substances, including chlorofluorocarbons (CFCs). This treaty, signed by 197 countries, has led to a significant recovery of the ozone layer, with a reported decrease in the Antarctic ozone hole by 2024. However, ongoing monitoring is crucial, as the 2023 ozone mass deficit reached 46.1 million tonnes.

1 of 2

Story summary

The UN reports the Earth's ozone layer is healing, with a smaller Antarctic ozone hole in 2024.
UN Secretary-General António Guterres credited global cooperation for this progress, coinciding with World Ozone Day and the Vienna Convention's 40th anniversary.
The Montreal Protocol has eliminated over 99% of ozone-depleting substances.
The ozone layer is projected to return to 1980 levels by mid-century, lowering skin cancer and ecosystem damage risks.
The 2023 ozone mass deficit was 46.1 million tonnes, below the 1990-2020 average, highlighting the need for ongoing monitoring.

1 / 2