[Terrapreta] Charcoal from tree bark

[Sunergy]

Waste bark is presumably also a problem in sawmills all around the world.
Here's one solution:

 

http://www.iht.com/articles/2007/05/31/business/bgbark.php

 

The article includes:  "Charcoal dust is also used for soil improvement.
Yamamoto was mostly producing it for that."

 

Max H

 

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