To be clear, I'm not saying emissions are not a concern. That's just not going to be enough, imo, to prevent the tech from dominating.
Currently, building a 2 story house creates about 80 tonnes of carbon, if I recall correctly. I can't find anything about how much a 3d printed equivalent creates, but it's definitely not going to take as much transportation of materials or labour (which means people driving back and forth to the site for months) to construct, nor will there be as much wastage.
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Better educated sadness than oblivious joy.
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