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Shale Gas - an overview | ScienceDirect Topics
Shale Gas Is One of the Least Sustainable Ways to Produce Electricity, Research Finds | Lab Manager
A time capsule containing 118 trillion cubic feet of gas is buried in northern Australia
Marcellus shale, source rock of huge quantities of natural gas, and used for fracking, near Marcellus, New York, USA, October 2013 Stock Photo - Alamy
Fracking Controversy - Top 10 Myths About Natural Gas Drilling
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