Analysis On The Change Of Air Quality In Beijing And Its Influencing Factors

In recent years, air pollution pollution received extensive attention, due to the ongoing Beijing fog and haze, air pollution has become the hardest hit. Therefore, to understand the status of air pollution in Beijing, pollutant sources and influencing factors analysis, and then find a plan to solve the problem of environmental pollution is the purpose and significance of this paper.Beijing has become one of the worst air quality in the top ten cities, the pollution problem has diversified, gathering, persist characteristics. This article will simply sources of air pollution in Beijing is divided into two categories: coal-fired flue gas and oil combustion exhaust(car exhaust), sources of air pollution that is harmful gases and fine particles of coal and oil combustion produced. The focus of this paper is to analyze the automobile exhaust pollution.This paper estimates the 2014 Beijing motor vehicle emissions of various pollutants. Beijing motor vehicle according to different uses can be divided into three categories: private vehicles, official vehicles and operating vehicles(including buses and taxis). For different models, this paper estimates the emissions, including carbon monoxide, carbon dioxide, sulfur dioxide, including nine kinds of pollutants, and subtotals. Estimates focus is to find the three variables for each type of model: ownership, with annual average emission factors for mileage and various pollutants. Which ownership data obtained by the Statistical Yearbook, the average annual mileage indirectly derived by traffic congestion index, emission factors can be calculated by COPERT4 model. Final summary data show that Beijing 2014 all types of motor vehicle exhaust emissions total more than 610,000 tons. The main sources of pollution are private cars and buses. The reason car air pollution is its base of large-scale, while the bus is due to the use of diesel-powered, emissions clean enough.Finally, this paper analyzes the pollution control policies and made recommendations accordingly. First, we believe that the effectiveness of motor vehicle tail number lines and new small passenger Yaohao policy is clearly insufficient. To solve the problem is to control the discharge of pollutants from the fundamental source, can increase the filtering device for the car, while the effective implementation of the fifth stage of emission standards for motor vehicles, automobile exhaust emissions and ultimately to a cleaner, less harmful substances in exhaust gases. Second, promoting the integration of Beijing, Tianjin and environmental policy, the focus is decentralized city functions to promote the development of environmental protection industry. The third stage is to analyze the development of environmental protection industry, and summarize the existing problems, mainly lack of policy support, the industry as a whole is not standardized. Finally, for good measure environmental laws were implemented new comb.