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NRC report concludes hydraulic fracturing poses low risk for causing earthquakes, but risks are higher for wastewater injection wells; CCS impact undetermined

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Hydraulic fracturing (“fracking”) extracts natural gas by injecting a mixture of water, sand, and chemicals in short bursts at high pressure into deep underground wells. CCS, due to the large net volumes of injected fluids, may have potential for inducing larger seismic events. —“Induced Seismicity Potential in Energy Technologies”.

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