Beijing (Picture 1), which is the capital city of China, located in the south-east of China. It is regarded as the political, education, and cultural center of China. Beijing has the area of 16.4 Km2. Permanent population of Beijing is 21.7 million in the year 2015(Shaxiren. 20145), and floating population is around 7.6 million. (People. 2014) Picture 1. Beijing (Wang, ND) What caused the air pollution? The mean reason which caused the air pollution is the daily life pollution. Due to the need for cooking, heating, and other daily life activities, the combustion of fossil fuels and other emissions are high. In addition, transport emissions of aircraft, ships, cars and other vehicles have significant influence on air pollution. Another aspect which contributes to air pollution is the industrial activity. There are a lot power plants, steel mills, cement plants and other large energy-consuming factories which consume huge amount of fossil fuels can cause air pollutant emission. Such as H2S, NH3, CS2, etc. Furthermore, the climate of Beijing also influences the air condition. Beijing's air pollution has a relationship with the domestic, industrial, mobile emissions, and the concentration changes of fine particulate matter also showed seasonality. For example, in the autumn and winter season’s conversion, pollutants spread more easily and accumulate to a higher concentration which is caused by the impact of wind, humidity and other conditions, so there would be higher possibility to cause haze weather. Air pollute condition in Beijing Air quality index (AQI) is a quantitative description of air quality situation index. The AQI of Beijing in 6 October, 2015 reached 364 which means the air quality is severely polluted. The primary air pollutant of Beijing is pm2.5. The regulation of daily pm2.5 concentration is 25µg/m3, but it can reach over 250µg/m3 in Beijing. And this is the mean cause of the phenomenon of Beijing cough. Picture 2. Comparison of Beijing air condition taking at two different locations
Refering to picture 2 above the left one was taken in the 70th anniversary of the victory of world anti-fascist war parade. And after the parade, the clear sky became foggy within one day. The mean cause of air pollution in Beijing is the excessive emission of pollutant by car and industrial production. If there are many people using bicycle or public transport like bus and subway, there is no doubt that the clear sky would come back to Beijing again. (Song. 2015) References People. 2014. Floating population in Beijing. http://bj.people.com.cn/n/2014/0618/c82840-21455593.html. Read: 28,09,2015 Shaxiren. 2015. Beijing. Baidu Baike. http://baike.baidu.com/link?url=S2arTcEJKiWzpQOtAXKDn0Nk4sA7e6irO08tKlJFS6TlndHJO75XE-TwbaQVgPKu57iG37ZJ50KXnHhBdPmYwpTXx7RI8MUUpfVRM38kPB3#5_1. Read:05,10,2015 Wang. X. ND. Beijing photographers association. www.bjpanet.com. Read:06.10.2015 Beijing municipal environmental monitoring center. 2015. http://zx.bjmemc.com.cn/web/index.aspx.Read: 06. 10.2015 Song. Y. 2015. Foggy come back to Beijing after parade. http://www.cankaoxiaoxi.com/china/20150910/933911.shtml Read: 05.10.2015 |
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