From what I'm reading, the method they're using right now to store the CO2 requires around 25 tonnes of water per tonne of captured CO2, and requires clean wate

From what I'm reading, the method they're using right now to store the CO2 requires around 25 tonnes of water per tonne of captured CO2, and requires clean water at that. They are apparently working on using saltwater instead, but don't have the tech yet. So I'm not personally convinced it is actually scalable for now. I will admit that they seem more serious than others (in particular, more than the company in this article, which is using CO2 to push more oil out of the ground).