>Inject CO2 into basalt formations...

Thanks for this comment - the calculations I'd been doing in the GP comment and elsewhere where pretty darn depressing and this approach you're mentioning is very exciting in that it bypasses the fundamental storage volume problems most other sequestration methods face by leveraging the interstitial spaces inside existing rock volumes, and also exciting in that it leverages undersea rock formations for even lower impact. Thanks for pointing me to this.

For others interested in learning more you might hit [0] or [1].

[0]https://news.climate.columbia.edu/2020/02/19/solid-carbon-ma...

[1]https://www.nature.com/articles/s43017-019-0011-8

There are a few startups exploring this and also PNNL is doing great public work on this topic as well. https://youtu.be/osXq-k84LpA?t=2177

Thanks, Mark - do you (or anyone else reading this) happen to know offhand any of the startups targeting this approach?

We don't claim to be experts on this subfield & this is may not be an exhaustive list, but Carbfix, 44.01, and the Solid Carbon coalition are some that come to mind to check out. We don't speak for those companies but just want to point out some areas to check out.

https://www.osti.gov/servlets/purl/1390435 <-- a non-commercial study on this topic.

https://youtu.be/osXq-k84LpA?t=2177 <-- a webinar that addresses this topic