In this Sept. 7, 2018 photo, Ilya Benesch stands in the doorway of his shop built on a property underlain with permafrost in Fairbanks, Alaska. A lot of houses in Fairbanks are built on permafrost, and there are techniques for building on that kind of ground that have been used for decades. For one homeowner, that concern is front and center as he builds a house on what he calls some of the worst ground in Fairbanks. (Ravenna Koenig/Alaska's Energy Desk via AP)
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