▲ 87 ▼ Used coffee grounds were charred at 350 degrees Celsius until they became a charcoal-like biochar. That material replaced 15 percent of the sand by volume in a concrete mix (scienceblog.com) submitted 2 months ago by inari@piefed.zip to c/environment@sh.itjust.works 20 comments fedilink hide all child comments
[–] Feathercrown@lemmy.world 1 point 2 months ago (1 child) Why is there CO2 in rocks why are they breathing permalink fedilink source parent hideshow 1 child comment replies: [–] roguetrick@lemmy.world 3 points 2 months ago* (last edited 2 months ago) https://en.wikipedia.org/wiki/Carbonate%E2%80%93silicate_cycle permalink fedilink source parent
[–] roguetrick@lemmy.world 3 points 2 months ago* (last edited 2 months ago) https://en.wikipedia.org/wiki/Carbonate%E2%80%93silicate_cycle permalink fedilink source parent