‘Everyone is breathing this’: how just trying to stay warm is killing thousands a year in the world’s coldest city

In Mongolia’s capital, Ulaanbaatar, coal fires heat almost every home. But as extreme weather drives families off the steppes into the city the air is becoming more deadlySteppes and the city: how smog has become part of Mongolians’ way of life – in picturesThe eldest child was away training for the army when his family died in their sleep. All six of them, two adults and four children, were poisoned by carbon monoxide gas seeping out from their coal-fired stove into their home