A new report released by the U.S. Environmental Protection Agency found that the controversial extraction technique can have a major effect on the quality and quantity of drinking water resources available to nearby populations.

This is report is very comprehensive, and included meticulous analysis of more than 1,200 sources of information and data.  It is also a complete reversal from a preliminary version of the report released in 2015, which plainly stated “no evidence that fracking systemically contaminates [drinking] water.”