Farmers in the Mississippi River Basin have long spread crushed limestone on fields to reduce soil acidity and improve crop yields. Now, a Yale-led study finds that the practice has also removed more carbon dioxide than it released over the past century.
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Adding limestone to Mississippi River Basin farmlands acts as a major carbon sink, study finds
Using a trove of historical records, researchers have found that a process known as agricultural liming stores more carbon in the soil than it emits, a finding that contradicts conventional emissions accounting.