The uncertain science of fracking

So the questions really come down to: should we be cautious, given the risks, or should we go "full steam ahead" (as it were).

According to the report, the “pertinent questions are difficult to answer objectively and scientifically, either because the relevant data have not been obtained; because some relevant data are not publicly available; or because existing data are of variable quality, allow for divergent interpretations, or span a wide range of values with different implications.”