Running in America's worst air: like binging on a carton of cigarettes'
Briefly

Outdoor enthusiasts, especially mountain runners, are increasingly monitoring the Air Quality Index (AQI) to ensure safe exercise amidst rising air pollution levels caused by factors like wildfires.
Denver, known for hosting numerous outdoor enthusiasts, faces severe air pollution issues due to factors such as population growth-induced traffic jams, trapping pollutants and wildfire smoke.
Read at www.theguardian.com
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