You don't need anymore research to know it is obviously dangerous. What we do need is leadership that doesn't bow down to cronies & supports stupid beliefs.
Hello from WV. (Northern panhandle here) Most of my family were steel mill folks but before the mills took off they were miners. Coal and mining (in general) are hell on the body.
I grew up in a county with two coal burning power plants in it. The air quality and asthma rates and improvement in my asthma when I moved away alone were enough for me, my wife had horrible asthma until she moved outside a 10 mile radius of one. I don't need a study to tell me they're not good for air quality.