Beijing Air Pollution Tops Hazardous Levels Days Before Congress

Beijing Air Pollution Tops Hazardous Levels Days Before Congress

Feng Li/Getty Images

A tourist wearing a mask walks on Tiananmen Square during severe pollution in Beijing on Jan. 31, 2013. Exposure to PM2.5 contributed to 8,572 premature deaths in Beijing, Shanghai, Guangzhou and Xi’an in 2012, according to estimates by Greenpeace and Peking University’s School of Public Health.