Copernicus Study Finds More Than Half the World Breathed Unhealthy Ozone Levels
A global study by Copernicus found that more than half the world's population breathed unhealthy levels of ground-level ozone, or smog, this year.
Portland, OR, October 29, 2026 —
A global study by Copernicus found that more than half the world’s population breathed unhealthy levels of ground-level ozone, also known as smog, this year. The finding points to widespread exposure, but the information provided does not give a more specific estimate of how many people were affected.
Details about the study’s methods and findings were not provided. The summary does not identify which countries or regions had unhealthy ozone levels, how those levels were measured, or how long people were exposed. It also does not state what threshold the study used to define an unhealthy level.
The available information does not name the researchers, provide a publication date, or say whether the study compared this year’s conditions with earlier years. It also gives no breakdown by season or population group. Without those details, the finding establishes the reported scale of exposure but does not show how conditions varied across locations or over time.
Ground-level ozone is identified in the study summary as smog, but no further explanation of its formation, sources or potential health effects was included. The study’s specific conclusions beyond the finding about population exposure were not provided.
Copernicus’s finding, as summarized, is that unhealthy ground-level ozone affected more than half of the global population this year. Additional information about the study would be needed to assess the geographic distribution, measurement basis and year-to-year context of the reported exposure.
Story summarized from the original created by Chris Pugh on www.oregonlive.com, see more information here.
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