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
- From the section Asia