Indoor air pollution and health

It is very inseparable correlative between indoor air quality of residences and human's health. The author investigated several cities such as Changsha, Shanghai, Wuhan, and Beijin from July in 2003. From the data measured at the homes which were fitted up in from half a month to four years, the author discovered that the indoor air pollution is very serious and the disqualification ratio is up to 98%. And the author also found that formaldehyde concentration universally exceeds the standard for indoor air environmental and the maximum exceeding multiples is six times. This paper points out that those pollutants mainly are emitted from building materials and furniture and they will affect humans' health if not to take any method to control it.