More properly known as hydraulic fracturing, fracking is a process in which liquid is pumped deep underground at high pressure to fracture shale rock and release gas or oil trapped within it.
How much potential is there for developing shale gas and oil?
Assessments by the British Geological Survey suggest there are an estimated 1,300 trillion cubic feet of shale gas resources in the Bowland Shale which stretches across northern England.
There are “modest” shale gas and oil resources in Scotland, with an estimated 80 trillion cubic feet in the Midland Valley and an estimated 6 billion barrels of shale oil in the area which stretches across Scotland and includes Glasgow and Edinburgh.
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