Pa.'s lax approach to the environment repeats itself.
Nature doesn't tolerate a void. When you remove any substance in great quantities ie: coal, rock, water, mineral, natural gas, etc., you create a void. Nature, will ultimately try to fill that void. The question is, with what, and when?
Case in point... the huge number and frequency of earthquakes in Arkansas. *Question: What do Arkansas and Pennsylvania have in common that it doesn't with Texas, Louisiana, and Wyoming? Answer: MOUNTAINS!
Are we so impressed by ourselves because we can do this, that we're not going to stop and think if we should?