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Posted Mon Apr 6 2009: from New Scientist:
Bug eats electricity, farts biogas
...An intriguing new idea involves "feeding" surplus power to the microorganisms instead, which combine it with carbon dioxide to create methane. That could then be stored and burned when needed. The method is sustainable too, as the carbon is taken from the atmosphere, not released from long-term storage in oil or coal... The new method relies on a microorganism studied by Bruce Logan's team at Pennsylvania State University in University Park. When living on the cathode of an electrolytic cell, the organism can take in electrons and use their energy to convert carbon dioxide into methane... If the CO2 used to make the methane was captured from the flue pipes of power stations or even -- using more complex methods -- from the open air, the methane would become a carbon-neutral fuel.
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'Doc Michael says:
These microorganisms are called "barking spiders."

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