500 is top of the scale!!! Better stop breathing! 2013-12-05 23:00 Shanghai AQI: 456 (PM2.5 434.4ug/m3, average of all stations in city), Hazardous!!!

500 is top if the scale!!! Better stop breathing! 2013-12-05 23:00 Shanghai AQI: 456 (PM2.5 434.4ug/m3, average of all stations in city), Hazardous!!! wp via jagottsicher@weibo