美国代写论文-北京空气污染的研究讨论

美国代写论文-北京空气污染的研究讨论,据观察,机动车排放、工厂烟囱排放、化学处理装置排放的气溶胶结合在一起,产生了极高的污染,并造成了覆盖北京天空的一层厚厚的雾霾(Gao)。据观察,到目前为止,煤是主要的能源来源,其在能源生产中的贡献比任何其他能源都要大75% (Elizabeth和Kenneth 90)。因此,主要的空气污染物包括含悬浮煤颗粒的煤烟和二氧化硫(SO2) (J. Lin, et al 1740)。研究强调,在大多数情况下,北京的污染变得更糟的是,它损害的可见性,成为低至50英尺(15米)和更低(罗德,R·穆勒,R)。在大多数情况下的空气质量比设定的可接受的质量高40倍(世界卫生组织)。接下有关美国代写论文-北京空气污染的研究讨论分享给大家阅读。

It has been observed that vehicular emissions, emissions from the chimneys of factories, chemical processing units releasing aerosol are combining together to produce pollution which is extremely high and creates a thick layer of haze that covers the day sky of Beijing (Gao). It has been observed that coal till date is the major energy source and its contribution in energy generation is 75 % compared with any other sources of energy (Elizabeth and Kenneth 90). Therefore, the major air pollutants include coal smoke with suspended coal particles, and sulphur dioxide (SO2) (J. Lin, et al 1740). A study highlighted that in majority of the cases, the pollution of Beijing becomes worse that it impairs proper visibility which becomes as low as 50 feet (15 meters) and even lower (Rohde, R. and Muller, R). In majority of the cases quality of the air is 40 times elevated than the acceptable quality set by WHO (World health Organization). In the year 2010, a study conducted by the Chinese Government presented that 1.2 million premature deaths are caused due to air pollution in China and there is a chance that lives of more than 500 million Chinese will be reduced by approximately 5 years because of air pollution that is increasing at an alarming rate in China (J. Lin, et al 1740).
During the time of summer Olympics hosted in Beijing in the year 2008, visibility as well as air quality of the atmosphere were both very crucial and important factors for achieving the success of the event (J. Lin, et al 1741). Several essential measures were taken to improve the visibility and air quality of Beijing (Socolow and Lam 29). It included removal of industries which were capable of creating more pollution out of the city (Rohde, R. and Muller, R). Beijing saw the use of natural gas instead of coal fuel and removal of leaded gasoline use. Since the year 1998, air pollutants like sulphates and nitrates have been drastically reduced and the concentration of PM10 has also been reduced after the year 2003. With the reduction in pollution, there has been visible improvement in atmospheric visibility observed in Beijing (J. Lin, et al). The then government of China planned to limit the vehicular emission at the time of Beijing Olympics in the year 2008 so that frequency of blue sky increases (Vautard, R, P Yiou and G, J Van Oldenborgh). But after the event was over, many such precautions taken during the event were not properly maintained and condition of Beijing’s atmospheric air quality again started to perish (Anenberg 1190).

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