Well, when you're off to work, under the road or under the buildings that you see, there might very well be cellular concrete, which is a very light kind of concrete that's actually got proteins from bones inside and it's also fully reusable.
Tā, pa ceļam uz darbu zem ceļa vai ēkām, ko redzat, tikpat labi varētu būt šūnbetons, kas ir ļoti viegls betona paveids, kurā patiesībā ir proteīni no kaulu iekšām, un tie ir arīdzan pilnībā pārstrādājami.