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In the present investigation, comparative studies have been done, to find the effect of air pollutants generated from the exhaust of industries and automobiles on the chrorophyll content of leaves. The leaves samples of Azadirachta indica, Nerium oleander, Mangifera indica and­ Dalbergia sissoo were collected from areas with potentially higher and lower levels of air pollution Photosynthetic pigments chlorophyll a, chlorophyll b and carotenoids were quantified. A reduction in the photosynthetic pigments of plant leaves growing in higher polluted site as compared to non or less polluted ones.

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The study has been carried out to investigate the chemical composition and type of linkages present in wax obtained from Pinus roxburghii Sarg. needles biomass. The spectroscopic techniques viz. FT-IR and GC–MS were employed to obtain spectral datasets. The results were analysed to identify major structural components constituting wax in native state. The spectral recordings were carried out at three different stages which include native wax, hydrolysed fatty acids and their corresponding methyl esters. Further, mass fragmentation has been discussed to represent the observed m/z values obtained in electron impact spectrum of fatty acid methyl esters.