A little delay in posting these…
A little more recent:
BEIJING — Visibility shrank to less than half a football field and small-particle pollution soared to a record 40 times higher than an international safety standard in one northern Chinese city as the region entered its high-smog season.
The density of fine particulate matter, PM2.5, used as an indicator of air quality was well above 600 micrograms per cubic meter — including several readings of exactly 1,000 — for several monitoring stations in Harbin, according to figures posted on the website of China’s environmental protection agency. They were the first known readings of 1,000 since China began releasing figures on PM2.5 in January 2012, and it was not immediately clear if the devices used for monitoring could give readings higher than that.
A safe level under WHO guidelines is 25 micrograms per cubic meter.
Super Smog Images