Beijing engulfed by massive sandstorm
Smog had already been forecast but now there's a sandstorm mixed together" Beijing resident Hu Jing told Reuters news agency.
There has been a sharp increase in sandstorms in China in recent years. According to the Press Association, China's expanding deserts now cover one-third of the country because of deforestation, urban sprawl and overgrazing. The shifting sands have led to worsening sandstorms, and the grit can travel as far as the western United States.
Just last month, pollution in Beijing reached hazardous levels: see the video below for more.