Arizona New Mexico border region targeted for CO2-based geothermal energy

Greenwire: A geothermal startup is hoping to use the world's most abundant greenhouse gas to extract heat buried deep below the Arizona high desert, while preventing millions of tons of the gas from ever reaching the atmosphere. Utah-based GreenFire Energy plans to tap naturally occurring carbon dioxide (C02) from the St. Johns Dome formation about a half-mile underneath the Arizona-New Mexico border near the town of Springerville, Ariz. The CO2, once compressed to a supercritical state, ......

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