What is fracking?

Fracking comes from the term hydraulic fracturing and is a process used to extract natural gas from the ground. This video explains the process and was produced by Cuadrilla Resources, the company that drilled the sites in Blackpool that caused two earthquakes in April and May last year.

Environmental groups contest some of the claims in this video. You can read their views here and here.

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Fracking 'should resume'

A controversial gas drilling technique which was stopped after triggering earthquakes near Blackpool is likely to be re-started - but with rigorous controls.