Submitted by Vasko Drogriski on Tue, 03/14/2017 - 7:32am Tool Concept Stage: Functional Prototype License: This work is licensed under a Creative Commons Attribution 4.0 International License. Description: A piece of equipment for making biochar, a soil enhancer and carbon sequestration Add new comment Documentation Documentation Wiki: Oil barrels wood stove flu Add new comment I like this tool up0 users have voted. I built (or modified) this tool up0 users have voted.