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Trees covered in snow in freezing conditions of minus 43 degrees Celsius in the city of Yakutsk, Sakha (Yakutia), Russia on December 13, 2020. It is the largest city located in continuous permafrost. With soil surface temperatures below −5 C, many of the houses have to be built on concrete piles. (Photo by Yevgeny Sofroneyev/TASS)
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