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Biochar

Burning plant mass in low oxygen yields a charcoal-like substance that can be used as a soil amendment, and sequesters carbon for thousands of years. We know this because a form of it was produced by ancient tribes, under the name of "terra preta".

This is the only solution I have heard of that sounds like it will actually work.

But nothing will suffice to reverse the process as long as we burn coal.

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by: limpidglass @ Fri Jun 26, 2009 at 22:50:02 PM CDT