Hydraulic "fracking" injects highly pressurized chemical fluids underground to release oil and gas that are bound in rock. It's an old practice made profitable by new technology, and its rapid spread has already outstripped the ability of California to control risks to human health, aquatic life and ecosystems. That's according to a report from the Wheeler Institute for Water Law and Policy at the UC Berkeley Law School. Michael Kiparsky is the Institute's Associate Director.
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