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Agricultural liming found to be a century-long carbon sink in the Mississippi River Basin

As of September 2026: Publishing research on agricultural liming as carbon dioxide removal

Farmers have spread limestone on acidic soil for a century, and climate accounting has treated the practice as a CO2 source. A new study in Nature argues that accounting is wrong: across the Mississippi River Basin, liming has been a net carbon sink since 1900.

Updated Sep 25