Passos vs Norilsk

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Norilsk (Russian: Нори́льск, IPA: [nɐˈrʲilʲsk]) is an industrial city in Krasnoyarsk Krai, Russia, located above the Arctic Circle, east of the Yenisei River and south of the western Taymyr Peninsula. It has a permanent population of 175,000. With temporary inhabitants included, its population reaches 220,000. It is the world's northernmost city with more than 100,000 inhabitants and the second-largest city (after Murmansk) inside the Arctic Circle. Norilsk and Yakutsk are the only large cities in the continuous permafrost zone.

The nickel deposits of Norilsk-Talnakh are the largest-known nickel-copper-palladium deposits in the world. The smelting of the nickel ore is directly responsible for severe pollution, which generally comes in the form of acid rain and smog. By some estimates, one percent of global sulfur dioxide (SO2) emissions come from Norilsk's nickel mines. The Nornickel company has its main operations in the area where it is the largest employer.

Source: Wikipedia