Though you can't see, smell or taste radon, it may be present at dangerous levels in your home. Radon is the second-leading cause of lung cancer, and causes over 20,000 lung cancer deaths each year.
Luckily, there's an easy and inexpensive way to find out. Simply buy a do-it-yourself radon test kit, available online or in many hardware stores. The U.S. Surgeon General recommends that all homes and buildings be tested for radon. If you have a radon level of 4 pCi/L or more, your home may contain dangerous levels of radon.
If radon levels in your house are too high, there are steps you or a professional can take to ensure your home is healthy. For more information and resources, contact your state radon office at http://www.epa.gov/radon/whereyoulive.html