I couldn't care much about the chemical stew of fracking in rust belt states; they have dumped toxic sludge into Lake Erie for a century. I do care about the explosion of moderate sized earthquakes in Oklahoma, notably starting in swarms around the same time that fracking was allowed. If we continue on this path, the earth will have new human-induced faults, possibly in the rust belt areas. Most unfortunate, the ground in these areas allow earthquakes to be destructive over a greater range than on the west coast. The lack of historical seismic activity makes the ground brittle compared to seismically active regions. If the region gets changed seismically from inactive to active in a brief period of time, the quakes will be far more destructive.