An international ban on ozone-depleting chemicals preserved the ozone layer and prevented a significant increase in global warming.

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The worldwide ban on chlorofluorocarbons (CFCs) helped avert a dangerous rise in the level of UV radiation reaching Earth’s surface. Tony Shi Photography/Getty Images

A 1987 worldwide ban on ozone-depleting chemicals known as chlorofluorocarbons (CFCs) averted a dangerous rise in the level of ultraviolet radiation (UV) reaching the Earth’s surface.

Without this multilateral environmental agreement, people worldwide would have faced a higher risk of skin and other cancers, eye damage, and possible immune system problems due to excess UV rays.

But a new modeling study from UK researchers suggests that the Montreal Protocol on Substances that Deplete the Ozone Layer also prevented a 2.5°C increase in global warming by the end of the century.

“As well as protecting the ozone layer, the…

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