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tired_hillbilly t1_j94oizl wrote

Creating concrete takes a lot of energy, which is one source of CO2, but creating cement releases CO2 in one step of the process. Even if you had a 100% carbon-free source of energy, creating cement still produces CO2.


iinavpov t1_j95a91h wrote

Yes, except that it's a low energy process (compared to steel, or even making CLT).

The volumes are gigantic, however.