论文代写：
北京的PM 2.5
北京是中国的首都,它是一个国际大都市。北京的人口超过1900万。这是中国的主要城市之一,正如我们所看到的世界,像所有的地铁城市北京也面临着空气污染的主要问题。颗粒物是主要污染物,存在于空气中,北京的居民创造一个问题。有两种类型的颗粒物(PM)即PM10和PM2.5。污染物可吸入颗粒物传播在整个城市的灰尘、烟雾和灰尘,来自工厂和农业。有毒的有机化合物,金属冶炼及加工、燃烧的植物材料和森林火灾负责PM2.5。在今年的前六个月平均已经观察到有PM2.5水平在北京每立方米102微克。整个国家的PM2.5是35岁左右。我们可以看到,北京是全国最有影响的城市。安全限制世界卫生组织推荐的PM2.5是大约10多较小,现有PM2.5污染状态。
公民的健康会影响更多的可吸入颗粒物PM2.5相比。研究,空气粒子越小,越有机会进入我们的肺(Kaiser,2000)。这些粒子在公民负责呼吸问题,有时它还会导致心脏衰竭。研究,每年有超过500000人死亡的整个世界,因为污染物PM2.5(达科里,1993)。
PM 2.5 in Beijing
Beijing is the capital of China and it is an international metropolis. The population of Beijing is over 19 million. It is one of the major cities of China and as we have seen that like all the metro cities of the world Beijing is also facing a major problem of Air pollution. Particulate Matter is the major pollutant which is present in the air and is creating a problem for all the residents of the Beijing. There are two types of Particulate matter (PM) i.e. PM10 and PM2.5. Pollutant PM10 is spreading in the entire city because of the dirt, smoke, and dust which come from factories and farming. Poisonous organic compounds, smelting and processing of metals, burning of plant materials and forest fires are responsible for PM2.5. In the first six months of the year it has been observed that there is an average of PM2.5 level of 102 micrograms per cubic meter in Beijing. The PM2.5 in the entire country is around 35. We can see that Beijing is the most effected city in the country. The safe limit of PM2.5 recommended by the World health Organization is around 10 which is much lesser that already existing PM2.5 pollutants in the state.
Health of the citizens gets affected more by PM2.5 as compared to PM10. It has been studied that the smaller the air particle is, the more are the chances of it entering into our lungs (Kaiser, 2000). These particles are responsible for respiratory problems in citizens and sometimes it also leads to cardiac failure. It has been researched that there are more than 500,000 deaths per year in the entire world because of the pollutant PM2.5 (Dockery, 1993).
