Jean Pain was a French forester who has revealed the power of wood chip compost to produce heat and methane as a sustainable energy source. The underbrush from woodland, which is routinely cleared as a potential fire hazard in hotter drier places, when chipped is an excellent energy source. Pain calculates that he can get at least 10% more heat by composting the wood-chip than by burning it, whilst getting a biogas yield as well as a excellent soil improver/ compost residue which he can grow food with. His giant compost heap produced usable heat for 18 months as well as yielding a large quantity of usable compost!
(There is a part 2 to the video. The link will appear in the video window, top left at end of part 1)