Using soil to lock up carbon could help offset global warming

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When bioenergy is produced by pyrolysis (low-temperature burning without oxygen) it produces biochar which has twice as much carbon in its residue than that from other sources. This makes bioenergy carbon-negative and improves soil health. Credit: Co ...
When bioenergy is produced by pyrolysis (low-temperature burning without oxygen), it produces biochar, which has twice as much carbon in its residue than that from other sources. This makes bioenergy carbon-negative and improves soil health. Credit: Cornell University

In the journal Nature, Cornell biogeochemist Johannes Lehmann writes that an economical way to help offset global warming is to pull carbon dioxide out of the atmosphere by charring biomass without the use of oxygen.


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