Federal regulators on Tuesday will issue new protections for miners against a type of dust long known to cause deadly lung ailments — changes recommended by government researchers a half-century ago. Mining companies will have to limit concentrations of airborne silica, a mineral commonly found in rock that can be lethal when ground up and […]
Read More Federal regulators on Tuesday will issue new protections for miners against a type of dust long known to cause deadly lung ailments — changes recommended by government researchers a half-century ago. Mining companies will have to limit concentrations of airborne silica, a mineral commonly found in rock that can be lethal when ground up and […]
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