Rising Levels of Toxic Gas Found in Homes Near Fracking Sites

http://www.nbcnews.com/health/health-news/could-fracking-raise-lung-cancer-risk-n338146


Radon is the second-leading cause of lung cancer in the U.S., killing an estimated 21,000 people a year. The odorless, invisible gas is produced naturally from many types of rocks, and many people who have bought or sold a home will be familiar with the radon test on the basement or ground floor.