Air pollution levels in Shanghai today, 6 December 2013, reached hazardous levels. A level of 301 and over is considered hazardous, with 500 being the maximum on the Air Quality Index. Numbers reached over 600 in some areas of Shanghai. Visibility was so poor that the cityscape across the Huangpu river was invisible. Authorities advised residents to stay indoors, and many of those who did venture outside were seen to be wearing face masks.
What do you think of this story?
Select one of the options below. Your feedback will help tell CNN producers what to do with this iReport. If you'd like, you can explain your choice in the comments below.
Be and editor! Choose an option below: