Summer is quickly drawing to a close in Mongolia’s capital, Ulaanbaatar, which means one thing: winter is coming—nearly six months of it. “UB,” as the city is commonly known, is the coldest capital city in the world with winter temperatures below -35 degrees Celsius. But the cold isn’t the only worry for the city. Winter also means the stubborn return of stifling air pollution largely absent during the warm summer months. Each winter UB’s nearly 1.5 million residents, roughly half Mongolia’s population, endure truly terrifying levels of ambient particulate matter. Read more
