Pollution reduction equipment manufacturing

FILE - In this May 2, 2019, file photo a worker arrives for his shift at the U.S. Steel Clairton Coke Works in Clairton, Pa. A fire at U.S. Steel's massive coke plant outside Pittsburgh knocked a key pollution control system offline Monday, June 17, 2019. It triggered a health warning as officials monitored the air around the plant for signs of a release of toxic sulfur dioxide. It was the second fire since December at the coke works, the largest facility of its kind in the United States. The plant turns coal into coke, one of the raw materials of steel. (AP Photo/Gene J. Puskar, FILE)
June 17, 2019 - 6:21 pm
The second fire in six months at U.S. Steel's massive coke plant outside Pittsburgh knocked a key pollution control system offline Monday, triggering a health warning as officials monitored the air around the plant for signs of a release of toxic sulfur dioxide. The Allegheny County Health...
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