There is a silent threat building up in the basements and crawl spaces of millions of American homes, and most people have no ...

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COLUMBIA, S.C. — January has been designated as Radon Action Month in South Carolina, and state environmental officials are urging residents to test their homes for the potentially deadly gas.

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Radon is an invisible, odorless gas that is the second-leading cause of lung cancer after smoking. An estimated 50% of Ohio homes may have high levels of radon due to minerals deposited by glaciers ...