Imagine you're an airline pilot. Which of the cities below looks like the more appealing one for landing a large jet?
— William Farris (@wafarris) January 29, 2013
To the left, an image of Beijing's air taken last week when the pollution monitor on top of the U.S. Embassy measured a fairly low level of particulate pollution (29 parts per million per volume). To the right? The air yesterday, at a level of 462. If you chose the image at left, congratulations. Airlines in Beijing agree with your assessment.
From Huffington Post:
Thick, off-the-scale smog shrouded eastern China for the second time in about two weeks Tuesday, forcing airlines to cancel flights because of poor visibility and prompting Beijing to temporarily shut factories and curtail fleets of government cars. ...
The U.S. Embassy reported an hourly peak level of PM2.5 -- tiny particulate matter that can penetrate deep into the lungs -- at 526 micrograms per cubic meter, or "beyond index," and more than 20 times higher than World Health Organization safety levels over a 24-hour period. …
Visibility was less than 100 meters (100 yards) in some areas of eastern China, the official Xinhua News Agency reported. More than 100 flights were canceled in the eastern city of Zhengzhou, 33 in Beijing, 20 in Qingdao and 13 in Jinan.