I listened to this on NPR earlier, didn't reread it, so I don't know if this isn't present in the piece, or other posters just didn't read. Miners said that the

I listened to this on NPR earlier, didn't reread it, so I don't know if this isn't present in the piece, or other posters just didn't read. Miners said that the respirators got clogged quickly, and it would feel like someone had their hands over your mouth. And the respirators that are recommended and provided protect you from coal dust, but not what causes this disease, silica dust.