http://www.nbcnews.com/science/environment/experts-trace-tainted-water-leaky-wells-not-fracking-n204061

“The drilling procedure called fracking didn’t cause much-publicized cases of tainted groundwater in areas of Pennsylvania and Texas, a new study finds. Instead, it blames the contamination on problems in pipes and seals in natural gas wells.”

Shades of global warming and lung cancer/tobacco.

So, fracking frees up gas and cracks the lining of the gas wells.  The gas then leaks into the groundwater.

These folks are insulting.