That in itself isn’t necessarily that unsustainable - prefabrication (as long as the factory is somewhat close to the final site) can be much better than buildi

That in itself isn’t necessarily that unsustainable - prefabrication (as long as the factory is somewhat close to the final site) can be much better than building on site because you need to move the thing once instead of having multiple workers travel out to the remote site every day for weeks, plus hauling in all the materials and then hauling out a lot of waste. Tools in the factory can be powered by electricity from the grid (and factory roofs are usually pretty good for solar), whereas on a remote site you would probably be using a diesel generator. So there are potentially a lot more pros than cons.