alternatehistory.com

Earth-sheltered buildings have been around since prehistorical times and were independently developed by many different cultures around the world. Yet, in modern times, the practice is quite marginal, despite the well-known advantages of using earth for thermal insulation.



Can anyone think of a POD preferably after 1900 that would make earth sheltering a common construction method by the latter decades of the 20th century? It doesn't have to be the dominant method, just one frequently used for low-rise buildings and private homes wherever local conditions make it suitable.
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