IIRC, we also have determined that fracking has helped initiate earthquakes.
In short, we cannot just blithely assume that every geothermal extraction will be benign.
Debbie keeps screaming that we need to be pursuing "closed loop" geothermal. And, while 700c is the awesome, scary stuff of "Journey To The Center Of The Earth', she reminds me that my heat pump does perfectly fine on 58f ground water.
