留学 论文代写：空气污染的主要原因
留学 论文代写：空气污染的主要原因
汽车和工厂排放的废气是城市污染的主要原因。空气中颗粒物(PM)的增加是导致北京大部分人口过早死亡、低出生体重和一般健康危害的主要原因，也增加了城市的雾霾。因此，本文将讨论中国人民由于北京空气污染物PM的增加而面临的主要问题。1979年，中国从社会主义转向了自由市场政策，这对数百万从贫困中被救出来的中国人来说是一个福音。但是，经济的这种转变和自由化带来了巨大的代价，即中国自然环境的残酷破坏。目前，中国是世界第二大经济体，但却以牺牲本国国民健康为代价(Anenberg、Horowitz和Tong 1189)。人们已经注意到，在这个城市中，有数百万英亩的农田被污染，污水从工业中流出。中国环境保护部指出，中国三分之二的地下水不适合饮用。
留学 论文代写：空气污染的主要原因
但是，空气污染物对中国生态退化的贡献是巨大的，而且最近几天被认为是环境关注的一个主要问题，而北京是中国污染最严重的城市之一。在全球20个污染最严重的城市中，有16个是中国(OECD)。北京的空气质量已经超过了美国环保局设定的可接受的污染标准。北京有大量的细颗粒物，也被称为PM。颗粒物质可以通过散射和吸收太阳辐射来影响一个地区的气候，从而削弱能见度。这个PM最终导致了与环境和健康相关的几个问题;它也影响着北京和整个中国的天气和气候条件。室外空气污染是中国的一个主要问题(Vautard, Yiou和Van Oldenborgh 117)。汽车尾气排放、工厂烟囱排放的尾气、释放气溶胶的化学处理装置正在结合在一起，产生极高的污染，形成一层厚厚的雾霾，覆盖北京的白天天空。人们观察到，煤是主要的能源来源，它在能源生产中的贡献是其他任何能源的75% (Elizabeth和Kenneth 90)。
留学 论文代写：空气污染的主要原因
Emission from vehicles and factories are highly responsible for city pollution. The increase amount of particulate matter (PM) in the air is a major cause of premature death, low birth weight and general health hazards of majority of the population of Beijing and it is also increasing the city haze. Therefore, the essay will discuss the major issues that the people of China are facing as a result of the increased PM as an air pollutant in Beijing. In the year 1979, there has been a shift from socialism to free market policy which was a boon to the millions of Chinese population as they were rescued from the grinding of poverty. But this shift and liberalization of the economy came by paying a major cost i.e. the brutal killing of the natural environment of China. At present, China is having the world’s second largest economy but at the cost of the lives of its own countrymen’s health (Anenberg, Horowitz and Tong 1189). It has been noticed that millions of acres of farmlands of the country adjoining to the city of Beijing are getting contaminated with the effluent running off from the industries. It has been mentioned by the Ministry of Environmental Protection of China that two-third of the underground water in China is unfit for consumption.
留学 论文代写：空气污染的主要原因
But contribution of air pollutants for degrading the ecology of China is dramatically high and has been considered as a major issue of environmental concern in the recent days and Beijing is one of the most polluted cities of China. Out of the 20 most polluted cities around the globe China is home for 16 of them (OECD). The city of Beijing exceeds the acceptable standard of pollution set by the Environmental Protection Agency, US several.The city of Beijing is crowded with huge quantity of fine particulate matter also known as PM. Particulate matter can influence the climate of a region by scattering itself and by absorbing solar radiation and thus impairs visibility. This PM is eventually leading to several problems associated with environment and health; it is also influencing the weather and climate condition of Beijing and that of China as a whole. Outdoor air pollution is a major concern in China (Vautard, Yiou and Van Oldenborgh 117). 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. 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).
