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Lung cancer continues to be one of the most common cancers worldwide, accounting for nearly one in four deaths from cancer each year. The U.S. Environmental Protection Agency’s (EPA) Indoor Environments Division is focused on two important causes of lung cancer that may be present in indoor air: radon and secondhand smoke.
Radon is the leading cause of lung cancer among nonsmokers, according to EPA estimates. Overall, radon is the second-leading cause of lung cancer (after smoking). Radon is responsible for about 21,000 lung cancer deaths in the United States every year, and approximately 2,900 of these deaths occur among people who have never smoked. The only way to know how much radon may be present in your indoor air is to test for it.
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