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 on paved roads to melt ice.

Source: [Phys.org](https://phys.org/news/2026-07-pennsylvania-roads-coated-radioactive-wastewater.html)

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