Green Sharp Sand Beaches As A Carbon Drawdown Technology?

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Green Sharp Sand Beaches As A Carbon Drawdown Technology?
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Afforestation, reforestation, rewilding, wetland restoration, and low tillage agriculture are much more scalable wedges than thousands of green beaches.

Carbon capture, direct air capture, and carbon direct removal are back in the hype cycle again, so yet again I’m looking at solutions that are technically interesting, if not remotely likely to scale. Under the microscope today isI’ve looked at multiple mineral weathering drawdown approaches.

What else is olivine? Well, it’s green. I can’t tell if it’s an attractive green or just a distinctive green, being colorblind, but the grand total of four beaches in the world that are olivine heavy are tourist attractions because it’s unusual. I’d share pictures I’ve looked at, but none are permitted for republication and so I had ChatGPT create a variant.

Communities can’t afford beach replenishment on their own so have to cobble together federal, state, county, and municipal money to get beaches replenished. This might be in Vesta’s interest if they can link funding for carbon drawdown, but it runs into other challenges. As noted, olivine is just cooled lava that is rich in magnesium iron silicate. It’s not pure magnesium iron silicate but comes with a wide variety of other minerals. All of them are things which will change the chemistry of the local ecosystems in some manner or other. Mining rocks in one place, grinding them up and dumping them on beaches has to be done with care in order to avoid significantly imbalancing the local ecosystem or even poisoning it.

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