Beijing skyline shrouded by smog
Media playback is unsupported on your device
Video

Anger as Chinese cities blanketed by thick smog

Sales of face masks are reported to have surged, as dense smog affects parts of northern China for a third day

More than four million comments on pollution were posted on one of China's main social networking sites, many bemoaning transport delays and the risks to health.

But the smog has raised health concerns. The BBC's Damian Grammaticas has more from Beijing.

  • 06 Dec 2011
Go to next video: Thick smog engulfs Chinese capital