Radon is a colorless, odorless, naturally occurring, radioactive noble gas that is formed from the decay of radium.  Radon is a significant contaminant that affects indoor air quality worldwide. Radon gas from natural sources can accumulate in buildings, especially in confined areas such as the basement and reportedly causes 21,000 lung cancer deaths per year in the United States alone.[1] Radon is the second most frequent cause of lung cancer, after cigarette smoking, and radon-induced lung cancer is thought to be the 6th leading cause of cancer death overall.