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Even if concrete held trapped air ... would we just learn that construction sites for big concrete buildings have a lot of diesel-burning trucks and equipment?
by abeppu 7y ago
Even if concrete held trapped air ... would we just learn that construction sites for big concrete buildings have a lot of diesel-burning trucks and equipment?
- koheripbal 7y agoI think OP is thinking of ancient concrete/cement used by ancient cultures such as the Romans.