Biochar
Biochar is a porous, carbon-rich material made by heating organic waste — like coffee grounds, wood, or agricultural byproducts — in a low-oxygen environment, which prevents it from simply burning and instead transforms it into a stable, highly porous solid.
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Around the world, over two billion daily cups of coffee are consumed. That means there are a staggering amount of coffee grounds getting tossed away every day. Researchers now have a plan to turn all that waste into eco-friendly insulation.