Rock beats paper: https://en.wikipedia.org/wiki/Project_Vesta https://en.wikipedia.org/wiki/Project_Vesta If it's true they could capture carbon at a cost of

Rock beats paper: https://en.wikipedia.org/wiki/Project_Vesta https://en.wikipedia.org/wiki/Project_Vesta If it's true they could capture carbon at a cost of $10/ton by weathering rocks it should be much more efficient than trees. It also de-acidifies the oceans.