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ABC News: 40% of the World’s Population Was Exposed to Dangerous Ozone Levels This Year
Nearly 40% of the world’s population was exposed to dangerous levels of ground-level ozone in 2026. Asia, Europe and North America were particularly affected. This is according to a new report from the Copernicus Atmosphere Monitoring Service (CAMS), cited by ABC News.
Ground-level ozone is different from the ozone layer that protects Earth from ultraviolet radiation. It is a pollutant that forms near the planet’s surface when other pollutants undergo chemical reactions driven by sunlight and high temperatures. As a result, periods of extreme heat can intensify ozone pollution.
According to CAMS, ground-level ozone concentrations exceed World Health Organization recommendations across much of the Northern Hemisphere. The most serious situation was reported in Asia, where high levels of pollutants are associated with industry, transportation, urban expansion and economic activity.
“Ozone pollution is a stark reminder of how interconnected our atmosphere, climate, health and livelihoods are,” said CAMS Director Laurence Rouil. According to her, air pollution and climate change affect air composition, the health of ecosystems and the ability to grow crops.
The situation in North America has shown little improvement in recent years despite measures to reduce emissions. Researchers attribute this in part to wildfires and climate change. Wildfire smoke contains ozone-forming substances and other pollutants and can travel thousands of kilometers.
Oceania, meanwhile, remains one of the regions with the most favorable air quality. According to the CAMS report, its entire population lives in areas with good or satisfactory levels of ozone pollution.
The Atmosphere Watch report covers the first eight months of 2026. Its authors emphasize that air pollution remains a global problem: according to the WHO, about 99% of the world’s population lives in areas where air quality does not meet its recommendations.
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