Karāchi, August 31, 2025 — A new study from the University of Reading has revealed that the healing of the ozone layer—long considered a triumph of environmental policy—could unexpectedly intensify global warming in the coming decades.
While the ozone layer plays a vital role in shielding Earth from harmful ultraviolet radiation, researchers now warn that its recovery may also trap more heat in the atmosphere. According to the study, ozone could become the second-largest contributor to climate heating by 2050, surpassed only by carbon dioxide.
Between 2015 and 2050, ozone is projected to add approximately 0.27 watts per square meter (Wm⁻²) of heat retention globally. In comparison, carbon dioxide is expected to contribute 1.75 Wm⁻², making ozone a significant driver of future warming—potentially 40% more than previously estimated.
“Ozone is a complex player in our climate system,” said Professor Bill Collins, who led the research. “While nations are right to continue banning ozone-depleting chemicals, we must now consider ozone’s warming effect in climate policy.”
The findings suggest that while ozone recovery remains essential for public health, climate strategies must evolve to address its growing impact on global temperatures. Scientists urge policymakers to integrate these insights into future climate models to avoid unintended consequences.
