From NewScientist.com...

Pumping carbon dioxide through hot rocks

"Pumping carbon dioxide through hot rocks could simultaneously generate power and mop up the greenhouse gases produced by fossil fuel power stations, according to a new study....Karsten Pruess, a hydro-geologist at Lawrence Berkeley Laboratory in the U.S., carried out the study and says carbon dioxide could theoretically boost the amount of energy produced by hydrothermal plants by 50% or more. At the same time, Pruess calculates that the technique could be used to dispose of the carbon dioxide produced by conventional power plants, which contribute to global warming."

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