Every growing season, crop residues like straw, husks, and stalks are often burned, plowed in, fed to livestock, or composted, releasing greenhouse gases such as CO₂, CH₄, and N₂O. A recent study by the Institute of Soil Science, Chinese Academy of Sciences, highlights biochar — a charcoal-like material made from crop residues through low-oxygen pyrolysis — as a more sustainable way to manage these byproducts and reduce emissions.
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