Toxic foam dumped into southern Illinois coal mine in unsuccessful attempt to extinguish underground fire
Coal Miner (Photo: Shutterstock)

Operators of a southern Illinois coal mine dumped toxic foam deep underground in an unsuccessful attempt to extinguish a fire that idled production last month, according to documents obtained by the Chicago Tribune. The type of foam used by St. Louis-based Foresight Energy is being phased out in Illinois and 11 other states under laws that for the first time restrict unregulated chemicals known as PFAS — shorthand for perfluoroalkyl and polyfluoroalkyl substances. PFAS are a growing concern worldwide because they remain in the environment forever, linger in the blood of exposed people for year...