[quotemstr]

These guys seem to have a viable approach to accelerated weathering, a form of carbon removal: https://projectvesta.org/

[AstralStorm]

There's not enough limestone deposits for this to work - that aren't actually being currently mined.

You cannot use a an active mine for this technique, you have to let the stone lie and weather.

[quotemstr]

Read their FAQ [1]. They're using olivine, not limestone, and there's a ton of olivine in the crust.

[1] https://projectvesta.org/frequently-asked-questions/

[tempestn]

Yes, I really want to see that project grow. There was a HN post recently where they gave a lot of fantastic answers to questions about the project: https://news.ycombinator.com/item?id=20403570

Of course, the more we can scale back greenhouse gas emission the less we'll need to extract, so IMO it only makes sense to come at the problem from both sides.

[TeMPOraL]

I skimmed their site and I'm yet to read the whitepaper, but I have one question that wasn't so far answered: what about transportation costs? Is this still net carbon negative when you account for the costs of moving all this rock and spreading it on the beaches?

[quotemstr]

They discuss that in their detailed proposals. There's a lot of discussion on siting and various transportation options. The math ends up working out.

[TeMPOraL]

Ok, thanks! I'll head on to reading the white paper then.

[funklute]

that's actually pretty cool