Coal Stoves Make Ulaanbaatar the World's Most Polluted City
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The 1.3 million people who live in Mongolia's capital city of Ulaanbaatar breathe the dirtiest city air in the world. It's a public health nightmare, and winter means facemasks, asthma and pneumonia. There is a solution, but it requires changing an ancient way of life for half of the city's residents. VOA's Kevin Enochs reports.