Omsk (198,200 tons in atmosphere) ranks seventh in world most polluted towns. A large number of major enterprises in the metal, light, printing, chemical, petrochemical and aerospace industries are based in the city.
In the proximities there are even dangerous plutonium 114 radiations. The city is dirty too and not very safe. The climate is terribly cold. Purchasing Power Index is very low for population, health care low quality!

You can see in numbeo.com