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Posted Mon Jun 28 2010: from Grist:
'Carbon storage' faces leak dilemma, study finds
Dreams of braking global warming by storing carbon emissions from power plants could be undermined by the risk of leakage, according to a study published on Sunday. Rich countries have earmarked tens of billions of dollars of investment in carbon capture and storage (CCS), a technology that is still only at an experimental stage. With CCS, carbon dioxide would be snared at source from plants that are big burners of oil, gas, and coal. Instead of being released into the atmosphere, where it would contribute to global warming, the gas would be buried in the deep ocean or piped into underground chambers such as disused gas fields.... Storing CO2 in the ocean will contribute to acidification of the sea, with dangers that reverberate up the food chain, says its author, Gary Shaffer, a professor at the Danish Centre for Earth System Science in Humlebaek, Denmark. It also carries a higher risk of being returned to the atmosphere by ocean currents and storms. Underground storage is a better option, but only if the geological chamber does not have a significant leak or is not breached by an earthquake or some other movement, says the paper.... To offset any bigger leak, re-sequestration would be needed -- in other words, grabbing an equivalent amount of CO2 from the air and storing it. But this would be a cost burden that could last for millennia.
[Read more stories about: ocean acidification, carbon sequestration]

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'Doc Jim says:
Guess we better work on that "clean coal" thing.
Which is "just around the corner," fer sure.

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