“After a couple of years, something changed. I began to see the type of disease that was only in the textbooks — this massive fibrosis, where the lung is basically destroyed. It’s nothing but black scar tissue. I was incredulous. And it was young people. It wasn’t the older miners. I thought, something is wrong here. We decided we’d better do some research.”
— Dr. Edward L. Petsonk, head of the black lung program for the National Institute of Occupational Safety and Health, on the recent resurgence of the disease, once a scourge among coal miners but virtually eliminated in the 1970s
