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How chocolate could counter climate change
Biochar production in Hamburg involves heating cocoa bean husks in an oxygen-free room to create a black powder that can sequester carbon and be used as a fertilizer or in "green" concrete. The United Nations' Intergovernmental Panel on Climate Change suggests that scaling up the use of biochar could potentially counter 2.6 billion of the 40 billion tonnes of CO2 produced each year.
Biochar was used previously by indigenous populations in the Americas for its sponge-like structure that increases the absorption of water and nutrients by soil.