Studies have found that organic carbon, elemental carbon, L-glucan, galactan, mannan, p-hydroxybenzoic acid, vanillic acid, syringic acid and dehydroabietic acid all show high values in autumn in Lumbini. The lowest in summer. The content of L-glucan in this region is comparable to the concentration level in areas affected by biomass burning in South Asia, which indicates that biomass burning has an important impact on the atmospheric environment in Lumbini. The organic carbon, elemental carbon and L-glucan have a significant correlation, indicating that biomass combustion is the main source of high-concentration carbonaceous components in the region. The results of the ratio of L-glucan / mannan and vanillic acid / syringic acid shows that the types of biomass burning in the area are mainly crop residues and hardwood burning. Based on the above, the following statements are true:. ['More crop residues and hardwoods in Lumbini.', 'Biomass combustion increases carbon concentration in Lumbini.', 'Biomass combustion continues to deteriorate the atmospheric environment in Lumbini.', 'The quality of the atmospheric environment in Lumbini is better in autumn and worse in summer.']