Spreading crushed silicate rocks like basalt on farmland could remove up to 1.1 billion tonnes of CO2 annually while boosting crop yields, according to a Cornell University analysis of enhanced rock weathering's global potential. However, some researchers question the figure's achievability, citing uncertainties about rainfall patterns, soil chemistry, mining impacts, and potential contamination risks.
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Spreading crushed silicate rocks like basalt on farmland could remove up to 1.1 billion tonnes of CO2 annually while boosting crop yields, according to a Cornell University analysis of enhanced rock weathering's global potential. However, some researchers question the figure's achievability, citing uncertainties about rainfall patterns, soil chemistry, mining impacts, and potential contamination risks.