silicate rocks basically traps co2 over millions of years and causes temperatures to fall

There are various companies/projects set up around that idea:

https://www.lithoscarbon.com/

https://en.wikipedia.org/wiki/Carbfix

https://co2crc.com.au/

https://sgeas.unimelb.edu.au/research/carbon-trap-lab

	▲	fred_is_fred 8 hours ago \| parent [-]
		The Lithos Carbon idea is interesting. The mine they show looks like they can just scrape it rather than needing to mine it with explosives. Unfortunately the site's blog has 1 post and it is 3.5 years old. Is it still a going concern?

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chris_va 9 hours ago | parent | prev [-]

It's really the alkalinity (e.g. the Mg++ or Ca++), which silicate rocks often have (but technically not limited to silicates).

As an aside, we need to dissolve roughly one large mountain into the mix layer (top ~50m) of the ocean to have it fully take up atmospheric CO2. Without dissolving, the reaction is very slow (co2 in atmosphere => slightly lower pH rain => reaction with mostly passivated rock + erosion).

	▲	russearyus 7 hours ago \| parent [-]
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