Rates are now as bad as the 1970s, with thousands of miners sick and dying. Mining experts blame toxic silica dust, now more common in mines.
(Image credit: Roger May for NPR)
Rates are now as bad as the 1970s, with thousands of miners sick and dying. Mining experts blame toxic silica dust, now more common in mines.

Rates are now as bad as the 1970s, with thousands of miners sick and dying. Mining experts blame toxic silica dust, now more common in mines.
(Image credit: Roger May for NPR)