Long before "air quality" became a data point in our weather apps, smog was a terrifying mystery, rolling into cities like a ...

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Emphysema is considered a smoker's disease. But it turns out, exposure to air pollution may lead to the same changes in the lung that give rise to emphysema. The study looked at the health effects of ...

Centuries before the term was even coined, scientists have known what causes smog. But deciding how to reduce air pollution — and then actually doing it — took a lot longer. Smoke and fog: Put them ...

Q: Why does the Model Year 2018 smog ratings chart look so different from previous years? New federal (EPA Tier 3) emission standards are in effect for MY 2018+, with many auto manufacturers taking ...

I'm sure you've heard of London's "sad and gray" reputation before. It's gotten to the point where it's basically a ...