Abstract-Using comprehensive pollution index and Daniel trend test rank coefficient methods and monitoring data from 2007 to 2013, the characters of the main air pollutants were analyzed and trend of atmospheric environmental quality was evaluated. Influence factors on air quality were discussed. Results show that air quality is poor in Baoji , the order of the index of main atmospheric pollutants is PM10 > S0 2 > N0 2 and N0 2 and SO 2 are on the rise, while the rank correlation coefficient of PM10 is the highest and decline significantly. The climate elements have great influences on diffusion of atmospheric pollutants and coal combustion and vehicle exhaust emissions are still the main pollution sources. This study provides a basis for environmental management.
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