And then there's this, from - http://hypography.com/forums/terra-preta/11493-backyard-smoke-what-do-biogas-making.html#post173285
"To date, I have found two technologies that offer some reason to hope that solutions could be developed at the individual household level:
1) The inverted downdraft gasifier. Developed to make more efficient use of wood for cooking in developing countries, it is undergoing continuing refinement. Many DIY-type folks are trying their hand at various configurations (The Garlington, the Magh smoke burner stove. The MIDGE (pdf). The James Butler MIDGE). It is a small batch process. It is highly efficient: a handful of twigs will boil a cup of water. The process is shut down about halfway through the burn sequence in order to retain the char.
Posted by Bruce F at June 12, 2008 10:07 AM
VIDEO ON BLINKX