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 3 - Clean production processes needed?
From: http://www.eprida.com
Researchers are working on methods to produce char cleanly and efficiently. Most use energy from biomass itself to drive the process and many propose to co-produce fuel from excess flammable gas . This process from Danny Day and the Eprida Foundation in Georgia adds other nutrients to the biochar based fertilizer product as well.

As a  mechanical engineer, I  can imagine there are many ways to conserve energy and reduce pollution. As a mechanical engineer with nuclear experience, I contemplate that the needed energy might even come from nuclear generated electricity. The production of biochar and fuels could thus be increased to  conserve  organic material and provide more fuel for transportation and other uses.