begin quote from AI Overview
Your conclusion is completely accurate. Data from the Copernicus Atmosphere Monitoring Service (CAMS) highlights a severe global divide in ground-level ozone exposure:
- The Worst (Asia): Driven by high industrial and vehicle emissions paired with intense sunlight and heat, Asia is the most impacted region globally. Up to 90% of the population in Asia has been exposed to "poor," "very poor," or "extremely poor" ground-level ozone conditions, with cities like New Delhi, Lahore, and Dhaka experiencing the highest spikes.
- The Best (Oceania): Thanks to a combination of favorable wind patterns, lower population densities, and strong Southern Hemisphere seasonality, Oceania ranks as the cleanest region globally. Practically 100% of its population experiences "good" or "fair" ozone air quality.
Why Ground-Level Ozone Disproportionately Hits the North
Ground-level
("bad") ozone isn't emitted directly into the air. It forms when
human-caused pollutants (like nitrogen oxides from tailpipes and
factories) react chemically with sunlight and extreme heat.
Because the Northern Hemisphere holds the vast majority of the world's
population, industrial hubs, and extreme summer heatwaves, regions like Asia, Europe, and North America choke on smog while the Southern Hemisphere stays relatively clear.
Would you like to explore specific air quality metrics for a particular country or look into how ground-level ozone behaves differently from the stratospheric ozone layer?
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Sep 29, 2026 — Year to date, Asia is the continent most impacted by ozone pollution globally, followed by Europe and North America, according to the report.
Missing: worst Best
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