Norilsk is the world's northernmost city with more than 100,000 inhabitants and the second-largest city (after Murmansk) inside the Arctic Circle. The city is situated in Russia. The average monthly temperatures in Norilsk range from -16.6°F (-27°C) to 57.2°F (14°C), but it once hit -63.6°F (-53.1°C). The city is covered with snow for about 270 days a year, and the inhabitants must deal with snowstorms one day out of every three.

It's not just one of the coldest cities of the world — it's also one of the filthiest. Nickel ore smelting has transformed the landscape into one of the ten most polluted places on Earth.

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