Seems to me that there is no way this form of energy extraction can ever be made safe, clean or environmentally acceptable.
It's well known that in the US many townships which once welcomed the industry have since bitterly regretted it, due to the health problems which come from air pollution - many toxins in the air resulting in sickness among children, and families feeling they have to move away out of the area.
Add water pollution, with inflammable and explosive methane flowing from the taps, with even families' wells being contaminated and the companies admitting their liability and so shipping in supplies of bottled water (see the PBS America documentary on Fracking)..
For each well, thousands of lorry-loads of fresh water had to be provided. That fresh water then is mixed with hundreds of known - and unknown / secret - chemicals, pumped deep deep down and along long pipelines below ground to split the shale, horizontally. Pumped back above ground it is now not only toxic, due to all those chemicals, but also radioactive.
More thousands of lorry-loads of this stuff then has to be moved to be dumped - but where?
We still don't know what to do about nuclear waste, from Sellafield etc.
Add to these issues, the fact that the desired horizontal splitting can also result in gases escaping via vertical geological faults, and also via cracks in 6-7% of well casings..
This industry has been banned totally by Australia and France and possibly other countries, as well as some of the American states.
All industries work on a profits before people principle - and this one is just too darn risky for us to take these chances. As the US has found out this is a question of wealth or health.
With oil and gas prices now so low, it is doubtful if the costs would justify these companies spending much to compensate for the harm they would definitely do.
But, hey, not to worry - Koch Industries is experienced in paying off politicians.
Compensation??? dream on suckers!