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Shale gas

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Shale gas

A
AFP English

1 Views • Nov 21, 2014

Wikipedia Context

Shale gas is an unconventional natural gas that is found trapped within shale formations. Since the 1990s, a combination of horizontal drilling and hydraulic fracturing has made large volumes of shale gas more economical to produce, and some analysts expect that shale gas will greatly expand worldwide energy supply.

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Description

Shale is a sedimentary rock found in huge deposits across the world. Exploitable reserves are currently estimated at 206,000 billion cubic metres, roughly the equivalent of conventional gas reserves. Gas can be extracted from shale rock in a process known as fracking.VIDEOGRAPHIC