Motherfrackers!?!?! http://www.washingtonpost.com/news/to-your-health/wp/2015/04/09/rise-of-deadly-radon-gas-in-pennsylvania-buildings-linked-to-fracking-industry/ Writing in the journal Environmental Health Perspective, researchers analyzed levels of radon — a colorless, odorless gas that is radioactive and has been linked to lung cancer — in 860,000 buildings from 1989 to 2013. They found that those in the same areas of the state as the fracking operations generally showed higher readings of radon. About 42 percent of the readings were higher than what is considered safe by federal standards. Moreover, the researchers discovered that radon levels spiked overall in 2004, at about the same time fracking activity began to pick up.