By the way, I just saw an article yesterday and thought about you because of this article on concrete...
https://www.smithsonianmag.com/innovation/combat-climate-change-researchers-want-to-pull-carbon-dioxide-from-ocean-and-turn-it-into-rock-180977903/#:~:text=Running%20seawater%20through%20an%20ocean,limestone%20on%20a%20grand%20scale&text=All%20of%20this%20excess%20carbon,are%20sensitive%20to%20the%20change.