I think they are going to need to do something about the materials for this to be really sustainable. I guess I don't know for sure what they are using to 3D print the houses. I am actually surprised that when you figure in the cost of the raw materials and the production process the cost is less than a traditional home. I saw those Lego style homes that they were making a while ago. Those were pretty cool, but again I don't see them being totally sustainable if they are using plastics as the materials.

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