Tendency analysis of project of changing fuel from coal to natural gas in improving Xi'an atmosphere environment

Through investigating the monitor data of Xi'an atmosphere environmental quality and the change of fuel,namely the variety and the distribute of the average concentration in a year and in a month of SO 2,NO x,TSP,the variety on the quantity of mobile car and on the dosage of coal,also the comparison of variety of the pollutant concentration in the atmosphere environment in each urban function region from 1990 to 2000,this paper analyzes the reason and tendency of change of Xi'an atmosphere environment and ascertains the function of changing fuel from coal into natural gas.Finally,the reliably practical basis for popularizing and progressing the project is made.