World's most polluted cities

Published On: Jan 14 2013 11:23:54 AM CST   Updated On: Dec 07 2013 11:55:33 PM CST

Severe pollution is once again choking Shanghai and other cities in China, disrupting hundreds of flights and forcing schools to close. China is home to some of the world's most polluted cities -- take a look at some of the others.

Most Polluted - Norilsk
12 / 12
Oleg Nikishin/Getty Images

Norilsk, Russia -- Founded as a Siberian slave labor camp and home to the world's largest heavy metal smelting complex, an estimated 4 million tons of cadmium, copper, lead, nickel, arsenic, selenium and zinc are released into the air each year, according to Time. Mortality from respiratory diseases is much higher than Russia as a whole.

Upload Photos / Videos