Natural gas: Should fracking stop?

@article{Howarth2011NaturalGS,
  title={Natural gas: Should fracking stop?},
  author={Robert W. Howarth and Anthony R. Ingraffea and Terry Engelder},
  journal={Nature},
  year={2011},
  volume={477},
  pages={271-275}
}
Extracting gas from shale increases the availability of this resource, but the health and environmental risks may be too high. 

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Tracing hydraulic fracturing fluids and formation brines using boron, radium, and strontium isotopes

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Frontiers of Fracking : Underground Political Ecology and Unconventional Energy in the Contested Landscapes of North West England

Gas obtained from previously unexploited shale rock strata has emerged as an economically viable way of sourcing additional fossil fuel energy resources after the so-called ‘shale gas revolution’ i
...

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