Pan Shiyi tests PM 2.5 on Shanghai subway

Updated: 2014-01-10 11:34

(chinadaily.com.cn)

Pan Shiyi tests PM 2.5 on Shanghai subway

Pan Shiyi, chairman of Soho China, uses a PM2.5 density monitor on Shanghai Subway Line 2 on Jan 9, 2014.[Photo/icpress.cn]