PM2.5 POLLUTION IN MAJOR CITIES IN CHINA: POLLUTION STATUS, EMISSION SOURCES AND CONTROL MEASURES

With the fast development of energy consumption and the slathering of fossil fuels, the emissions of sulfur oxide, nitrogen oxide, ozone as well as particulate matters have increased, urban air pollution problems have become increasingly prominent. In early 2013, more than 17 provinces in China encountered hazy weather caused by PM2.5. PM2.5 has great influence and harm to human health and ecological environment, some measures should be taken to reduce and control its emissions. In this paper, pollution situation and characteristics of PM2.5 in China are investigated, different areas are analyzed to identify the sources of PM2.5 and their attribution rate. The results have been shown that PM2.5 pollution exists in more than eighty percent cities in China. The common sources in almost all cities are coal-burning emissions and vehicle exhaust emissions, among them: coal-burning emissions contribute more in the northern cities in winter. Since the motor vehicle exhaust is one of the largest pollution sources, severe technical and manage measures should be taken to decrease its emission. Finally, policies and technical advices are put forward in order to provide a theoretical basis for PM2.5 pollution control in China.