Radon is a naturally occurring radioactive gas that you cannot see, smell, or taste, so it could be present at dangerous levels at home without you knowing it. This gas is the second leading cause of lung cancer deaths in the United States and the number one leading cause among non-smokers, claiming more than 20,000 lives every year. If a high radon level is detected in your home, it can be fixed through mitigation, Radon reduction techniques, and reduction systems.
You can order a radon kit through the North Carolina Radon Program site.