A group of expatriates stand along the Bund as they distribute face masks to pedestrians to raise awareness of air pollution in downtown Shanghai

 
A group of expatriates stand along the Bund as they distribute face masks to pedestrians to raise awareness of air pollution in downtown Shanghai
A group of expatriates stand along the Bund as they distribute face masks to pedestrians to raise awareness of air pollution in downtown Shanghai January 24, 2013. According with the U.S. consulate air quality readings, which measure PM2.5 particulates Shanghai's air quality was "very unhealthy" on Thursday. REUTERS/Carlos Barria