![Dangerous smog engulfs Beijing Dangerous smog engulfs Beijing](http://www.saharasamay.com/pics/article/2015_12_08_06_17_50_beijingsmog4.jpg)
Beijing's air this morning turned from "very unhealthy" to "hazardous" as PM 2.5 - particulate matter with size equal to or less than 2.5 micron and the main gauge to identify pollutant particles in the air - touched 365 compared to yesterday's 256 level.