The U.N. has identified Kabwe, a city of almost 300,000 people in Zambia, as one of the most polluted places on the planet.

Nine million people have been left choking on toxic, putrid air in the most polluted city on Earth. Vietnam’s capital Hanoi topped the list of the most polluted major cities for the first time ...

Sitting in his garden in Chowa township, one of the most polluted areas in Kabwe, former miner Andrew Siyanga, 77, remembers his colleagues being "leaded ... mine's closure, the earth remains ...