US Restricts Deadly Mining Dust as Black Lung Resurrects
Federal regulators on Tuesday issued new protections for miners against a type of dust long known to cause deadly lung disease — changes recommended by government researchers half a century ago.Mining companies will have to limit concentrations of airborne silica, a mineral commonly found in rocks that can be lethal if ground up and inhaled. The new requirements affect more than 250,000 miners who mine coal, a variety of metals and minerals used in products such as cement and smartphones. Tuesday's announcement is the culmination of a tortuous regulatory process that has spanned four presidential administrations.The miners paid dearly for the delay. As progress on the rule stalled, government researchers documented with growing alarm a resurgence of severe black lung afflicting youn...