“In this type of plant, coal is heated until it turns into coke, an ingredient used to make steel. When heated, coal releases carbon dioxide, sulfur dioxide and other pollutants.”
Can't say that's surprising, I'm sure Pittsburgh's overall health has come a long way since they shifted away from the steel mills and factories that used to fill the city. I'd say it's hard to pin it on this one factory when they've been working to clean up the city for decades.
It's funny, growing up near a steel mill/train hub, I took for granted how confused other people might be about what the hell "coke" is.
On-topic - I once looked up stats for estimated premature deaths due to industry in our area and it was eye-opening. I really want to get out of here.
Crazy how people have the ability to overlook/ignore deaths caused by things as long as the deaths are a bit more gradual. A hundred premature deaths over the course of a year or so is practically nothing on the public's radar, but if an accidental release at the mill killed a single person downwind, there'd be hell to pay.