Also: basalt on croplands, carbon dioxide removal
Spreading crushed silicate rock on farmland to speed natural reactions that remove CO2 from air.
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Beerling and colleagues assessed the potential and costs of large-scale CO2 removal by spreading crushed rock on croplands, by nation, for 2050.
As reported in: Beerling, Kantzas, Lomas et al. (2020). Potential for large-scale CO2 removal via enhanced rock weathering with croplands. Nature. doi:10.1038/s41586-020-2448-9