Analysis of acidic and alkaline property about atmosphere rain

The acidic and alkaline property of atmosphere rain considered that it was controlled by the concentration of SO 4 2- and NO X - in the atmosphere.But a series of studies showed that the pH of atmosphere rain had little to do with the concentration of that ions and concentration of atmosphere rain,but varied regularly with the chang of the concentration of TSP in the atmosphere.The value of TSP in the atmosphere was considered to show not only contaminative degree in the atmosphere but also the acidic and alkaline degree of atmosphere rain,and also to explain the reason of acidic and alkaline property and to predict the acidic and alkaline property of atmosphere rain.