26 Jun '11, 2pm

Biochar: Restoring soil & reversing climate change. Too good to be true?

Biochar: Restoring soil & reversing climate change. Too good to be true?

As Jonah explained it to me, organic matter—crop waste, wood chips or even sewage—can be turned into biochar by heating the materials to between 300 and 900 degrees C. This generates a synthetic gas that can be converted into liquid fuels, used for heating or generating electricity, as well as the biochar, which is then worked into soil to improve farm productivity. (The yield of products from pyrolysis varies with the temperature; lower temperatures produce more char, higher temperatures make more syngas.) Proponents claim that the biochar then sequesters carbon in the soil for hundreds to thousands of years—carbon that would otherwise be released into the air if the organic matter were burned or allowed to decompose.

Full article: http://www.marcgunther.com/2011/06/26/biochar-too-good-to...

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