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Deadly Ozone Levels Rise with Summer Heat Across Europe
10 Jul
Summary
- Ground-level ozone, harmful to health, surges during European heatwaves.
- June's heatwave saw elevated ozone, especially in Germany and Italy's Po valley.
- Ozone pollution exacerbates respiratory diseases and damages vegetation.
Western Europe experienced widespread air pollution during last month's record-breaking heatwave, with ground-level ozone concentrations significantly elevated. This harmful ozone, distinct from the beneficial upper atmosphere layer, forms when pollutants react in intense sunlight, peaking in late afternoons.
During the June heatwave, ozone levels notably increased across Europe, with the highest concentrations observed in Germany, the Benelux countries, and Italy's Po valley. While peak concentrations were lower than in previous heatwaves like 1976 and 2003, the average exposure levels remain a concern. This "super pollutant" is linked to serious health issues, including respiratory diseases and aggravated asthma.
Beyond human health, ozone pollution also damages vegetation, leading to browning and premature leaf drop. In 2024, a substantial portion of Europe's agricultural land was exposed to ozone levels exceeding EU targets. Experts emphasize that ozone pollution is influenced by climate change, including heatwaves and wildfires, and requires coordinated international mitigation strategies, particularly concerning methane emissions.
