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Biochar
lightweight black residue, made of carbon and ashes, after pyrolysis of biomass / From Wikipedia, the free encyclopedia
Biochar is a type of charcoal added to soil that acts as plant food, or fertilizer.[1] Biochar is made by heating biomass like wood in an oven to very high temperatures. This removes all of the water and easy to burn material from the biomass leaving only carbon. The final result is fragile and dark black charcoal.[2]
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