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Colorado has high levels of radon, which can cause lung cancer – here’s how to lower your risk

  • Written by Jan Lowery, Professor of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus
imageRadon exposure is the leading cause of lung cancer for people who have never used tobacco.Francesco Scatena/iStock via Getty Images

In Colorado, as of 2025, about 500 people a year die from lung cancer as the result of radon gas exposure. Nationally, the number of lung cancer deaths attributed to radon is about 21,000 per year.

Radon is present...

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