I have been impressed with the kilns made by pro-natura for "green charcoal" production.
http://www.pronatura.org/?lang=en&page=climate#clim1
Does the board know how much excess energy is released in the exothermic reactions that make charcoal?
It seems to me that few kilns are catching the extra energy. Is this because there isn't much or if not, where can I find others that do for large scale production?
