AirToob Lightning
Our Good Earth from National Geographic
Biochar is an ancient process that is making a comeback. It does many things at once: starting with most urban, agricultural or forestry biomass residues, it can generate energy, enrich soil, and actually remove carbon from the atmosphere. It is not merely carbon-neutral, but carbon-negative.

The biochar process is akin to a process utilized thousands of years ago in the Amazon Basin, where islands of rich, fertile soils called Terra Preta ("dark earth") soils were created through a process similar to pyrolysis (one example of which is the production of charcoal by burning wood with restricted oxygen).

The beautiful picture above comes from a superb online National Geographic article (sadly no longer available) called "Our Good Earth", which introduced me to this process, and which provided me with one of the many positive topics in my "Environment and Technology" page (which has just had a major update).

The modern biochar process is summarized below. It is interesting (for me, anyway) to compare it with the food recycling process that generates both fertilizer and energy, now in widespread use in the UK.

[Food recycling in the UK (from my web site)]
[The International Biochar Initiative]
[Recent links on the Biochar process]
[Terra Preta, the "Black Revolution"]