What is the primary cause of Ulaanbaatar's air pollution in winter?
Industrial emissions
Traffic congestion
Ger district heating
Forest fires
Answer
The primary cause of Ulaanbaatar's air pollution in winter is the burning of coal and other fuels for heating in the Ger districts. The rapid population growth and influx of migrants have led to an increase in the number of Ger districts, contributing to the city's air pollution problem.
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