I don't see many ferriers or coopers these days either, but I doubt union membership had much to do with that. Interestingly, black lung cases have increased i

I don't see many ferriers or coopers these days either, but I doubt union membership had much to do with that. Interestingly, black lung cases have increased in the last decade https://www.cdc.gov/niosh/updates/upd-07-20-18.html https://www.cdc.gov/niosh/updates/upd-07-20-18.html I wonder if that correlates with union membership?