Sprinkling basalt over soil could remove huge amounts of carbon dioxide from the atmosphere

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"Sprinkling powdered basalt over natural ecosystems would remove vast amounts of carbon dioxide from the Earth’s atmosphere while also improving soils. That’s the finding of a new study that evaluates this proposed geoengineering scheme and estimates the costs involved. ..."

"... Here we explore soil amendment with powdered basalt in natural ecosystems. Basalt is an abundant rock resource, which reacts with CO2 and removes it from the atmosphere. Besides, basalt improves soil fertility and thereby potentially enhances ecosystem carbon storage, rendering a global CO2 removal of basalt substantially larger than previously suggested. ..."

Sprinkling basalt over soil could remove huge amounts of carbon dioxide from the atmosphere – Physics World

Potential CO2 removal from enhanced weathering by ecosystem responses to powdered rock (no public access, however above article contains link to PDF)