Combustion of coal,which is the major energy sorce in China,is one of the most important anthropogenic processes to produce SO_2.Chen et al. (1995) estimated that production of SO_2 that is the precursor of sulfate aerosols is twice as high as that of NO_x by the coal ocmbustion in China.It was indicated also in their work,that the perentage of So_4 is much higher than that of NO_x in the rainfall in CHina.Therefore,the dominant chemical component of anthropogenic aerosols form coal combustion in China is sulfate.
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