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View Diary: Sea Urchin offers path to Cheap Carbon Sequestration (118 comments)

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  •  In the long term to make it sustainable (18+ / 0-)

    you'd need to "close the loop" somehow. That's how sustainable systems work. They form closed loops. Waste from one process becomes food for another, and eventually the matter cycles all the way back again.

    That's why biomass is potentially sustainable.  The carbon is captured from the atmosphere in plant form, transformed into fuel, re-emitted into the atmosphere. The atoms go round and round, and the only net input is solar energy and the only net output is entropy. Contrast this to fossil fuels in which the carbon is extracted from the ground and ultimately dumped into the atmosphere.  

    Of course, this particular idea is meant to address the problems created by another non-sustainable technology: fossil fuels.  If the supply of calcium exceeds what is needed to sequester a significant fraction of all the carbon that will ever be emitted from fossil fuels,  until the day fossil fuels simply become uneconomical to use in any quantity, then this particular sequestration process might be practical.

    If the supply of calcium is insufficient to make a dent in the total future carbon emissions from fossil fuels, then this process is only useful if it is part of a larger, sustainable (i.e. closed loop) system.  For example, if the calcium carbonate was used to carry the carbon to a place where it could be extracted and sequestered separately, and the calcium could be recovered and reused.

    I've lost my faith in nihilism

    by grumpynerd on Tue Feb 05, 2013 at 06:07:01 PM PST

    [ Parent ]

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