Radon is a colorless, odorless gas that is produced naturally in the earth. It enters homes through small cracks in basement floors, foundations, and through water, as well as around pipes and other small voids in the house. The Surgeon General has warned that radon is the second leading cause of lung cancer in this country, second only to cigarette smoking. Since every home, even in the same neighborhood, can have greatly different concentrations of radon, the only way to be assured that the level of radon in your home is below dangerous levels is to have a sample of the air tested. Radon testing is strongly advised whether you are buying, selling or just for your piece of mind for living in your own home.