As families button up their homes to guard against winter's chill it is an ideal time to make plans to test for radon, the odorless, colorless gas that is our nation's second leading cause of lung cancer. According to the U.S. Environmental Protection Agency (EPA), radon causes more than 21,000 deaths each year, making it the second most common cause of lung cancer deaths in the United States and the number one cause among non-smokers.