Carbon emissions: Catch them if you can - CNN.com
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And then there is biochar -- the gas and charcoal that arises from a process of burning any form of biomass with the absence of oxygen, called pyrolysis.
Charcoal is one of the most stable forms of carbon known to man. It is also an excellent soil fertilizer.
Biochar in its charcoal form is seen by many, including Flannery, as one of the single most important carbon sequesters in the world -- perhaps even better than reforestation.
Put simply, reforested trees can be cut down, but once charcoal is plowed in the soil, it's there to stay for up to a thousand years.