With respect to industrial practices, the most polluted region of Russia is located around

A. Lake Baikal.

B. Moscow.

C. Norlisk.

D. Volgorad.

The correct answer is C. Norlisk. It is the most polluted city in Russia because it's an industrial zone full of factories and smelting locations for things such as Nickel. It has historically always been used for industry and has become the most poluted Russian city directly responsible for things like smog and acid rain.