It's the protection of the ground water that worries me the most. In the US they don't need to disclose the chemicals they pump into the ground during the process. Some law about trade secrets. Ground water is a precious resource that should be protected. LA's huge reserve was well and truly polluted by industry in the last century and now with our drought, is unusable to a great extent. Fracking is of huge economic benefit and the US has done well to lessen dependence on dodgy parts of the world. Seems there is some connection to small earthquakes also.
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