The EPA Defines radon as follows; Radon is a cancer-causing natural radioactive gas that you can’t see, smell or taste. Its presence in your home can pose a danger to your family's health. Radon is the leading cause of lung cancer among non-smokers. Radon is the second leading cause of lung cancer in America and claims about 20,000 lives annually. EPA has launched a new series of television, radio and print public service announcements encouraging people to test and fix their homes for radon. This is a good time to focus on testing and on fixing homes with a radon level of 4 pCi/L or more. Heed the Surgeon General's warning. Take action now to reduce your family's risk of lung cancer from radon!   http://www.sunnuclear.comhttp://www.epa.gov/radon