Permafrost turns out to not be quite as "perma" as Soviet planners thought. When the Soviet Union threw up new cities in Siberia to support the extraction of various natural resources there, infrastructure and buildings, including multistory apartment buildings, were constructed on top of the permafrost. Now, as the permafrost has begun to melt and shift, the structural integrity of these cities is at risk. A new study looks at engineering threats to Siberia's cities: onlinelibrary.wiley.com/doi/10.1111/gere.12214/full Permafrost underlies as much as 2/3 of Russia's landmass.
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