Spreading volcanic rock on farmland not only has the potential to remove carbon dioxide but has several side benefits, the scientists said. The practice does not compete with the use of agricultural land — in fact, it can enhance the quality of the soil, improving crop yields while reducing the need for artificial fertilizers. Rock left over from mining or construction — “waste rock” — can be processed for this use, creating a reason to recycle it, the researchers said.

 

https://www.washingtonpost.com/climate-solutions/2020/07/08/spreading-rock-dust-ground-could-pull-carbon-air-researchers-say/