What is the air pollution like around the world?

Post date: May 12, 2016 12:09:42 PM

The "World Air Quality Index" project (http://aqicn.org/map/world/) is collecting and displaying information from around the world in real time.  They are also considering archiving that information for retrospective analyses.

Global data coverage is critical because 4 of 5 cities that report monitored air pollution exceed the WHO limits (http://www.who.int/mediacentre/news/releases/2016/air-pollution-rising/en/). 

What about those cities that aren't reporting?