8 ms·

Newer studies have put doubt to olivine's effectiveness: https://www.technologyreview.com/2022/03/30/1048434/why-using-the-oceans-to-suck-up-co2-might-not-be-as

• pfdietz 4y ago
  That was about putting olivine in seawater, not spreading it on soil. My concern with all these approaches is the nickel content of olivine, which can be several tenths of a percent.
  • ncmncm 4y ago
    Yes, you would favor using the low-nickel supply on farmland. I wonder if nickel in olivine would be harmful on beaches.