Guardian: What is fracking?
The process of hydraulic fracturing – or "fracking" – involves drilling a hole deep into the dense shale rocks that contain natural gas, then pumping in at very high pressure vast quantities of water mixed with sand and chemicals. This opens up tiny fissures in the rock, through which the trapped gas can then escape. It bubbles out and is captured in well that brings it to the surface, where it can be piped off.
Why is it controversial?
Many shale deposits are buried under......
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Shale gas fracking – Q&A
Posted by Washington Post: Juliet Eilperin on April 20th, 2011
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