Coal’s Backup Plan: Ignite It Underground

Midwest Energy News: As low-cost natural gas displaces more and more conventional coal plants, a relatively unknown method for extracting energy from coal - without removing it from the ground - might seem far-fetched. Backers of the technique, however, still believe the technology has a future in an increasingly carbon-constrained world. Underground coal gasification, or UCG, is a method in which coal seams are basically ignited underground, and the gas released by the combustion is harvested and refined so that......

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