I figured this song would go along with the map I just posted on Surface Mines for Coal in Pennsylvania. https://andyarthur.org/google-maps-coal-strip-mines-in-penna.html

Tom Paxton's 1970 classic about Black Lung Disease that coal miners once got frequently and is now becoming more common once again with mountain top and strip mining.

Seems like an appropriate song with today's news on Black Lung Disease making a come back...

http://www.buzzfeed.com/chrishamby/black-lung-disease-surges-to-new-highs-research-shows#ulc9hm