I've seen several commercials warning about the risk of cancer from radon gas. Radon is estimated to be the second leading cause of lung cancer. Discourage smoking in your home. This will reduce your family's overall chance of developing lung cancer, as well as reduce risk from radon exposure. Test your home for radon.
Kits are available at retail stores and county extension offices.
If the radon level is four or more picocuries per liter of air, retest. If the two results average more than four, consider taking steps to correct the problem. If you are buying a home, ask to have it tested for radon. If you are building a home, ask the builder to use EPA and National Association of Homebuilder approved radon-resistant construction techniques. Limit time spent in areas with higher concentrations of radon, such as your basement.