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More than a third of the global population, exactly 34 percent, has been exposed to extremely high levels of ozone pollution this year, driven by heatwaves, wildfires, and human-caused emissions, according to a report released by the European Union’s Copernicus climate service. The data, compiled from satellite and ground observations combined with atmospheric models, shows that only 5 percent of the world’s population experienced “good” ozone levels, while 15 percent saw “acceptable” conditions.
Regional Impact: Asia and North America Hardest Hit
Asia faced the most severe conditions during the first eight months of the year, with 53 percent of the continent’s population exposed to “extremely high” ozone levels. In North America, two-thirds of residents experienced either “poor” or “very poor” air quality. Meanwhile, in Europe, roughly 45 percent of the population breathed air with poor to extremely poor ozone values. The Copernicus report shows the direct link between climate change and worsening air pollution.
What Causes Harmful Ozone Levels?
Ozone forms when sunlight’s ultraviolet radiation triggers chemical reactions between nitrogen oxides (NOx) and volatile organic compounds (VOCs). Road and shipping traffic, industrial activity, and wildfires emit nitrogen oxides. VOCs easily evaporate at room temperature and come from everyday household items like cleaning products, paints, cosmetics, and building materials. When these pollutants react under UV rays, ozone forms, penetrates deep into human airways, and causes coughing, burning eyes, and shortness of breath.
Did you know? According to Ian Marnane of the European Environment Agency, speaking to persbureau AFP, air pollution is one of the top environmental risks to human health. It causes about 180,000 premature deaths in Europe annually, with ozone alone accounting for 60,000 of those fatalities.
Future Challenges for Global Air Quality
Despite significant improvements over recent decades for some of the most harmful pollutants—particularly in Europe due to clean air regulations—copernicus warns that ozone remains a particularly complex global challenge. It poses a major risk to both human health and natural ecosystems.
Frequently Asked Questions About Ozone Pollution
How does ozone affect health?
Ozone penetrates deep into the respiratory tract, causing coughing, shortness of breath, and burning eyes. It can also trigger asthma attacks and worsen conditions for individuals with existing respiratory illnesses.
Which regions experienced the worst air quality?
Asia was the hardest hit, with 53 percent of its population exposed to extremely high levels in the first eight months of the year. North America followed closely, where two-thirds of the population faced poor or very poor air quality.
What creates ground-level ozone?
It forms through chemical reactions between nitrogen oxides from traffic, industry, and wildfires, and volatile organic compounds from household products, all driven by ultraviolet solar radiation.
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