Basalt is the most common volcanic rock on the planet. A new geoengineering study has considered the impacts of adding basalt to large expanses of soil so that the natural process of carbon sequestration (CCS) can be sped up significantly. Other benefits are increased crop yields, better drought resilient soils, reduction in acidity (especially in the oceans from run-off), additional revenue streams for farmers (carbon credits) and scalability at costs competitive with other CCS tactics (other than re-forestation - which isn't possible at scale in all soil types/locations).