外文翻译中国大气污染现状

Air pollution state of china 1 Urban air quality situation of china In recent years, our urban air quality is stability, the trendy is improving. There are 660 cities officially designated in the monitoring of 343 cities, the air quality of secondary and tertiary levels and the urban poor around one third of each volume. Ultra-slight decline in the proportion of urban standards, particles from pollution broader, serious pollution in some cities sulphur dioxide, nitrogen dioxide are all urban pollution. The areas affected by acid rain and pollution stability, the South acid rain polluted areas, the acid rain control zone of the city has more than 90% acid rain 113 air pollution control in key cities, the air quality of Grade 2, Grade 3 and the number of urban poor levels respectively 40, 41 and 32, respectively 35.4%, 36.3% and 28.3%. Of these, 36 cities where sulphur dioxide and particulate emissions standard urban 73. Our air quality urban environment with the following features : First, the particles are still the primary pollutants. Particle emissions are the main pollutants affecting air quality in 343 monitored cities, 60% of particles from urban concentration limit, 64.6% of the city where major cities. Particle pollution from the northern city overall in the South-cities, particles from polluted cities mainly in the northwest, north China, Shanxi, Shaanxi, Henan, Hebei, Ningxia, Gansu, Xinjiang, Inner Mongolia and other provinces and regions of the particle pollution are more prominent. The sulfur dioxide discharges the current situation:with the fast development of the economy of our country, coal consumption is increasing constantly. National coal consumption rises to 1,280 million tons in 1995 from 980 million tons in 1990, the sulfur dioxide discharges the total amount to increase sharply with growth of the volume of consumption of coal. The discharge general quantity of national sulfur dioxide reaches 23,700,000 tons by 1995. Discharge in the source in all kinds of sulfur dioxide, the power plant and emission of industry boiler account for 70%, becoming the discharge rich and influential family, all kinds of percentage of discharging the sulfur dioxide of pollution sources is ed as follows: Civil cooking utensils 12%, industrial kiln 11%, boiler 34% of industry, boiler 35% of hydropower station, other 8%. The smoke and dustThe smoke and dust ，，dust discharge the current situation:the total amount of smoke and dust thatdust discharge the current situation:the total amount of smoke and dust that the national fire coal was discharged was 14,780,000 tons in 1995, among them the thermal power plantthe national fire coal was discharged was 14,780,000 tons in 1995, among them the thermal power plant and emission of industry boiler accounted for more than 70%. In discharging, local power plant the dustand emission of industry boiler accounted for more than 70%. In discharging, local power plant the dust remover of poor efficiency because