[Terrapreta] Folke's retort kiln

[Philip Small]

The feedback on Folke's simple kiln has been a tremendous help to me. I have
rearranged and lightly KISSed the Biochar FAQ
<http://terrapreta.bioenergylists.org/biocharfaq>accordingly.  (previous
version <http://biochar.pbwiki.com/FrontPage.2008-05-28-19-44-24>)

Glowing hot charcoal downwind from the pyrolysis front is a very good thing
(for burn efficiency, for lower GHG footprint), I trust it will continue to
spark discussion on the list. -phil
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