A portion of the Clairton Coke Works, a U.S. Steel plant, is seen Monday, Aug. 11, 2025 in Clairton, Pa. (AP Photo/Gene J.

The Clairton Coke Works has seen accidents and emission violations. Will new owner Nippon Steel invest in one of the few ...

The air monitor generates a beam of infrared light, shoots it down to that mirror, which causes it to bounce back.

The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long p ...