Causes www.post-gazette.com Future of industrial Mon Valley should be cleaner, speakers say Activists call on political, business, civic, academic leaders to support tougher emissions standards for Mon Valley's biggest polluter.
Causes Mobile sources of pollution significant in Mon Valley, study says U.S. Steel says soot pollution levels declined significantly when traffic declined during pandemic stay-at-home orders in March.
Causes www.post-gazette.com Petition demands information about air pollution at U.S. Steel's Edgar Thomson Works The Allegheny County Health Department is being asked to detail its plans to reduce harmful pollution from the Braddock mill.
A controversial facility that would process plastic waste to be burned in steel mills has been cancelled
