Many residents of Ulan Bator, Mongolia, use coal-burning stoves during the winter months when staying warm is a matter of survival. But the pollution is hazardous to their health.

Letters: Climate change is driving long-term environmental damage and sudden catastrophes, presenting a global long-term threat to human security

Climate change and the end of Soviet state support have forced 600,000 to migrate to the capital, leaving it struggling to cope.

After wearing a disposable air pollution mask for two weeks, I am completely disgusted, and scared of the processes that happen in my lungs.

This summer has been one of the rainiest Ulaanbaatar has ever experienced, leaving behind puddles of water that result in cracked and deteriorated roads.