Charcoal takes some heat off global warming: Biochar can offset 1.8 billion metric tons of carbon emissions annually

As much as 12 percent of the world's human-caused greenhouse gas emissions could be sustainably offset by producing biochar, a charcoal-like substance made from plants and other organic materials. That's more than what could be offset if the same plants and materials were burned to generate energy, concludes a new study.

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