North Dakota State University scientists could help extract oil and natural gas

The Fargo Forum reports researchers are studying the composition of clay samples that could be used in the hydraulic fracturing process.
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The Fargo Forum reports researchers are studying the composition of clay samples that could be used in the hydraulic fracturing process.

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Bill in South Dakota would open state to 'fracking'

Some lawmakers in South Dakota want to show their support for hydraulic fracturing, a controversial process that uses water, sand and chemicals under high pressure to extract oil and gas from rock in the earth. The process has opened up new energy sources and driven down the cost of natural gas, but critics say it pollutes groundwater, and the EPA is studying it closely.