It's one of the best options we know that could work. Basically grind up readily available basalt with technology we already have at scale and dump it into the

It's one of the best options we know that could work. Basically grind up readily available basalt with technology we already have at scale and dump it into the oceans and onto agricultural soils - which is quite beneficial for soil structure, too. But I'm afraid it's not going to be sexy enough for technocratic phantasies and it cannot be monetized through some kind of futuristic looking devices.