The chemical components and sources of the WSON in theambient aerosols have been little understood. The WSON in theaerosols can be broadly separated into two categories; reducedorganic nitrogen species and oxidized organic nitrogen species.Reduced organic nitrogen species include urea, alkyl amines, andamino acids that have been reported to originate from varioussources, such as the ocean, terrestrial vegetation, organic litter,microorganisms, biomass burning, agricultural activity, animalhusbandry, anthropogenic combustion processes, waste treatment,and various industries
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