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Ambitions for a carbon-free impact and few emissions: At eco-town Kalu Yala, members of the community live as sparingly as possible, using what they can from the environment around them while replenishing what they can. (Candace Butera/Medill)

Northwestern University
Through a scientific process that seems almost magical, the creation of biochar takes you a step closer to reducing your carbon footprint. But this technique has a history that dates back further than you might think.