3) Wastewater pollution: A separate issue is what happens with all that water after it has been used to crack open shale and is pumped back up to the surface. The oil and gas industry produces billions of gallons of this murky wastewater each year, which typically contains chemicals that were added for the fracking process.In many states, this wastewater is pumped back underground into separate "injection wells." But when there aren't enough injection wells available, the water is either stored in tanks and holding ponds or sent off to treatment plants. That raises the risk of either accidental spills or improper treatment. In 2013, three treatment plants in Pennsylvania were fined for dumping waste into the Allegheny River. http://www.vox.com/2015/6/4/8730689/fracking-EPA-drinking-water ммм рыночек