Articles on Ozone

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Denver was barely visible through the smog on Feb. 9, 1986. Pollution like this is why the Clean Air Act was created. Denver Post via Getty Images

What air pollution does to the human body

The EPA is changing how it assesses proposed regulations by dropping the monetary value of health benefits from its cost-benefit analyses. That misses a big piece of the picture.
Coho salmon at a fish farm on Jan. 24, 2025, in Auburn, N.Y. A growing body of evidence shows that tire additives are contaminating ecosystems. (AP Photo/Craig Ruttle)

Car tires are polluting the environment and killing salmon. A global plastics treaty could help

Tires are complex chemical products. When they wear away, they release additives into the environment that can poison wildlife.

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