coke

Reid Frazier / StateImpact Pennsylvania

The world’s largest steelmaker has agreed to pay nearly $2 million because of air pollution violations at a Westmoreland County coke plant.

Carnegie Library of Pittsburgh collection

When Emily Eckel moved to Knoxville, a neighborhood south of downtown Pittsburgh, she was told to buy special subsidence insurance, just in case the abandoned coal mine beneath her house ever caved in. She'd never heard of it.