• blazera@lemmy.world
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    3 days ago

    You literally cant do it, its a chemical reaction that outputs co2. In the same way you cant run a combustion engine without producing co2.

    • silence7@slrpnk.netOPM
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      3 days ago

      You can use a different chemistry to make a hard substance. There are a ton of options which look good in tests, and pretty much nobody uses them.

      • blazera@lemmy.world
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        3 days ago

        You are reaching far too deep to try and imagine this somehow turning out alright for the climate. The hundreds of billions are budgeted already. Highway construction is happening. Conventional concrete is being used. Truck and SUV sales are increasing to fill the new highways.