Science and Exploration

Public Health

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A hazy, smoke-filled orange sky looms over a U.S. city skyline, illustrating the impact of wildfire smoke on air quality.
Space & Astronomy

Wildfire smoke significantly boosts U.S. ground-level ozone

Ground-level ozone pollution, once steadily declining, has reversed course since 2015, now rising by 0.

Dr. Alistair Finch·June 5, 2026