I don't know how valid the "19,000 bathtubs" of concrete number is, but it's worth noting much of this is poured vertically (as in footings or high rises or thi

I don't know how valid the "19,000 bathtubs" of concrete number is, but it's worth noting much of this is poured vertically (as in footings or high rises or thick pads). That might buy us a little time until the planet is covered.