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As you can see from the photo (foreground), there is a quite a lot of low-quality waste wood available from this source. A "big picture" of biochar is to look for feedstock for biochar that would otherwise be a waste management problem, and would quickly decompose and contribute to greenhouse ga...more
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Yes, there are large differences -- as we write in the recent review referenced here, it's more appropriate to speak of "biochars" than "biochar" given how large the differences are. The feedstock used to is especially important, with large variation even among different types of wood, for examp...more
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