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Beijing Failing Chinese Air Quality Standards Test
Professor Wang Wen-Xing and his team from the Chinese Research Academy of Environmental Sciences in Beijing carried out the study.
The purpose of their study was to inform measures to improve the air quality of the capital, in anticipation of the Olympic Games.
Wen-Xing and colleagues measured the concentrations of well-known air pollutants in Beijing in August and September 2007, the same summer period the Olympic Games will be taking place this year, in order to get a picture of the likely air quality during the games.
They compared their results against The National Ambient Air Quality Standard.
The researchers found that average daily concentrations of sulphur dioxide and carbon monoxide were lower than the National Ambient Air Quality Standard for China.
itrogen dioxide levels met the Standard, whereas concentrations of ozone and inhalable particles were higher than the Standard. The concentrations of air pollutants were also higher at night than during the day.
According to the researchers, the main causes of this air pollution are vehicle emissions.
Since the 1980s, the rapid industrial development, urbanization and increase in traffic have resulted in severe air pollution in Beijing. In recent years, the number of cars in Beijing has increased sharply at a rate of 10-20% a year.
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