Pennsylvania roads are being coated in radioactive wastewater − here’s why. Pennsylvania’s roughly 100,000 oil and gas wells produce wastewater that’s many times saltier than seawater and contains radium, a known carcinogen. For decades, that saltwater, called brine, was spread on dirt and gravel roads across the state to control dust and also on paved roads to melt ice. https://theconversation.com/pennsylvania-roads-are-being-coated-in-radioactive-wastewater-heres-why-286208