It's back: Wave of smog hits Beijing

Most urban districts of Beijing began seeing moderate air pollution early Sunday owing to weather conditions that are "not favorable for dispersing pollutants", Beijing Youth Daily reported on Sunday evening, citing the Beijing Environmental Monitoring Center.

The pollution is expected to reach its peak on Monday, and some parts of southeast Beijing will see heavy air pollution, the environmental watchdog told the newspaper.

This pollution will clear on Tuesday, the watchdog said.