The U.N. now recognizes dzud as a slow-onset natural disaster

"Despite the toxic air, Ulaanbaatar is still a draw for many. Life in the countryside is harder. To understand why Mongolians are moving away from rural areas to urban centers, let’s hit the road."

That is, the population increase in Ulaanbaatar helped drive the pollution problem, but why did so many people move to Ulaanbaatar in the first place?

That's where the discussion of climate change comes up, with quotes like:

"Mongolia is a drier, warmer place than it was in her childhood."

"Climate change is degrading the pastureland further — through drought especially."

"Mongolia weathered consecutive dzuds from 1999 to 2002 and again from 2009 to 2010, all against the backdrop of a drought linked to climate change."