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Most houses in Sweden still have - Jordkällare / root cellars
root cellar plans | The steps have been poured and a heavy duty door installed. The ...
Earth Sheltered Housing: The Burrow -- An ultra-modern earth-sheltered home with floor-to-ceiling glass
Underground GreenHouse Design into the hillside
Earth House by Peter Vetsch
These underground homes will get you thinking about alternative ways of living: http://theownerbuildernetwork.co/lj5j