Water follows the shale trail

The market for wastewater treatment solutions to serve shale gas wells could be worth $100 billion over the next 50 years. Emily Pickrell investigates.

The discovery of potentially huge natural gas reservoirs in the Northeast Marcellus Shale has left US natural gas companies with visions of gigantic extractions dancing in their heads. But the water-intensive extraction technique required to establish the gas wells – known as hydraulic fracturing – will generate billions of gallons of contaminated water that will need to be cleaned...

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