Are we moving backwards as a species? Within living memory existed people who could make domes and staircases out of nothing but a thin layer of tile and mortar. We are completely unable to make grand gothic cathedrals from nothing but stone. The computer models think these things should fail but they have lasted hundreds if not thousands of years.

The Cement accounts for more emissions than shipping, heating or aviation, iron production is even worse. Construction from natural stone for superstructures should be the most environmentally friendly construction method but today it's only ever really used as a façade.