[Eupalinos of Megara appears out of a time portal from ancient Ionia] Wow, you guys must be really good at digging tunnels by now, right?

  • admiralteal@kbin.social
    link
    fedilink
    arrow-up
    21
    ·
    edit-2
    9 months ago

    Cements and other pozzalanic materials also tend to be very alkaline. Industrial dumping of waste concrete can create a huge environmental hazard.