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Fireworks may cause PM2.5 to rise to dangerous level

(People's Daily)

13:25, January 13, 2012

Edited and translated by People's Daily Online

During the Spring Festival, Beijing's PM2.5 concentration value is tens of times higher than the safety value set by the World Health Organization (WHO).

During the Spring Festival of 2006, the Beijing Municipal Environmental Monitoring Center and the College of Life and Environmental Science under the Central University for Nationalities jointly carried out a survey. The results showed that setting off huge amounts of fireworks and firecrackers intensively could lead to a sharp rise of the particle concentration in the air.

Taking the Spring Festival Eve of 2006 as an example, the concentration of the particles smaller than 2.5 micrometers increased by nine times and reached about 800 micrograms per cubic meter, but the particles larger than 2.5 micrometers almost did not increase.

Particles whose diameters are less than 2.5 micrometers are the PM2.5. They could be breathed into the pulmonary alveolus directly and are very harmful to the human body.

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