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View Diary: In Search of Climate Solutions (10 comments)

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  •  biochar the only option I have heard of (4+ / 0-)

    that would be cheap, simple, scalable, and limit some of the adverse consequences that would accompany any such large-scale project to alter the earth's chemistry.

    Even then, it might affect the soil in unforeseen ways when implemented on the scale needed to mitigate climate change.

    There have been studies about making biochar from algae. So perhaps that is a possibility.

    "In America, the law is king." --Thomas Paine

    by limpidglass on Tue Mar 19, 2013 at 11:18:46 AM PDT

    •  Biochar is a good idea but far too small (1+ / 0-)
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      Biochar serves to take wood that will eventually rot and transform it such that, when buried in soil, it will only slowly release the carbon (and then not immediately into the air). One can also accomplish the same end, and for much longer duration, by sinking the tree into the ocean depths.

      The Strand and Benford (2009) study on sinking agricultural waste (corn stalks, inedible leaves, etc.) is relevant here because that is half of land-based production.
      But it only sinks about 1% of the current 10 GtC/yr emissions. We need something that is 3x current emissions, 30GtC/yr, to actually clean up, with 10-15 GtC/yr going to zero continuing out-of-control emissions.

      I don't see us getting anything like that from land-based photosynthesis. I don't even see us countering the current 10 GtC/yr emissions rate without using enhanced ocean production (and sinking) in a big way.

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