Pollution Forces North China to a Standstill.

The article discusses the closure of roads, schools, and an airport in northeastern China on October 22, 2013, as a result of heavy smog from coal and crop burning and vehicle emissions. Topics include mounting public pressure for increased air pollution prevention efforts by China's local and central governments, the air quality in Harbin, China, the management of air pollution in Beijing, and the health impact of chronic exposure to particulate matter.