论文部分内容阅读
北京市大气污染十分严重,已被列入全球十大污染城市之一。目前北京市机动车保有量已达140万辆,大气中HC的73.5％、CO的63.4％、NO_X的46％来自机动车排放。由于汽车排放位置低,对低空环境造成的污染更严重,所以加大汽车排放治理力度势在必行。为了更好地落实北京市政府控制大气污染的措施,有效地改善北京市大气质量,由北京市科干局、市市政管理委员会主办,市交通局承办,中国车检中心信
Beijing’s air pollution is very serious, has been included in one of the top ten polluting cities in the world. At present, the number of motor vehicles in Beijing has reached 1.4 million, with 73.5% of HC in the atmosphere, 63.4% of CO, and 46% of NO_X coming from vehicle emissions. Due to the low emission of vehicles and the more serious pollution to the low-altitude environment, it is imperative to increase the emission control of vehicles. In order to better implement the Beijing municipal government measures to control air pollution and effectively improve the air quality in Beijing, the Beijing Municipal Bureau of Science and Technology, the municipal government commissioned by the Municipal Bureau of Transportation, the China National Vehicle Inspection Center letter