Wildfires Are Reversing Years of US Air Quality Gains, Study Finds

InsideClimate News
By By Avril SilvaJun 9, 2026, 4:55 am279 ptsTop
Tailpipe emissions standards implemented early this century helped reduce smog levels. Longer, more intense fire seasons have erased much of that progress. By Avril Silva Wildfires have worsened ozone levels across the United States so much over the last decade that they have reversed around four years of…

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