| http://www.w3.org/ns/prov#value | - the tar sands deposits surrounding the horizontal shafts are subjected to fracking by use of high pressure steam, compressed air or explosives prior to treating with a chemical release agent. **from 20100272630 , as to what is fracking:[0022]The technique of hydraulic fracturing is used to increase or restore the rate at which fluids, such as oil, gas or water, can be produced from the desired
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