Lung cancer is the only documented health risk connected with radon exposure. Scientists are currently researching other possible health risks from radon exposure. Currently, lung cancer is the only proven health risk from radon exposure.
Radon is a radioactive gas, so the danger comes from breathing it in. This also means that smokers are at a higher risk.
Radon is the #1 leading cause of lung cancer in non-smokers. It is the leading environmental cause of cancer. Fortunately, testing for radon is simple and inexpensive. If your home has high levels of radon, it can be fixed.
To learn more about the health risks of radon, visit the EPA's radon website.