The process involves pumping water containing small percentages of other materials into the porous shale under pressure to hydraulically fracture it and release the trapped oil and gas.

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Fracking is a controversial process that involves pumping water and chemicals into shale rock at high pressure to extract gas.

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The process involves extracting gas from rocks by pumping in sand, water and chemicals.

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But the Fed Chairman is fixated on trying to fix the high unemployment problem in the U.S. by pumping up an already recovering economy, and in the process has his head in the sand regarding inflation.

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Under the process of fracking, oil or gas is extracted from shale rock by pumping a mixture of sand, water and chemicals into the rock at high pressure.

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