It is found that the organic carbon, elemental carbon, l-glucan, galactan, mannan, p-hydroxybenzoic acid, vanillic acid, syringic acid and dehydrogenated rosin acid in Lumbini area show high values in autumn and the lowest in summer  The content of l-glucan in this area is similar to that in areas seriously affected by biomass combustion in South Asia  It shows that biomass combustion has an important impact on the atmospheric environment in Lumbini area  There is a significant correlation between organic carbon, elemental carbon and l-glucan in Lumbini atmospheric aerosols  It shows that biomass combustion is the main source of high concentration carbon components in this area
The results of the ratio of l-glucan / mannan and vanillic acid / syringic acid show that the types of biomass combustion in this area are mainly the combustion of crop residues and hardwood
There are many crop residues and hardwoods in Lumbini area.