Wildfires are reversing America's progress on ozone pollution

PHYSorg
Jun 5, 2026, 10:20 am73 ptsTrending
For decades, the United States made steady progress in reducing surface ozone pollution, the main ingredient in smog. But that progress—made as vehicles, industries, and power sources became cleaner—is increasingly being overshadowed by a different and growing source of ozone pollution: wildfires.

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