Nearly half of Europeans, Switzerland included, breathed poor or very poor air over the first eight months of 2026, according to a new Copernicus report
The European climate service says record heatwaves and forest fires drove ozone pollution to extreme levels for more than a third of the world's population.
Two-thirds of North Americans were affected, along with 53% of Asians.
Copernicus calls the problem "a particularly complex global challenge" because pollution can travel thousands of kilometres beyond its source
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