At the height of a few meters, completely extended and developed leaves were gathered from each plant in the polythene packs and transported to the research center. The leaf tests were gathered each long stretch of fifth dated from all the 2 locales and this recurrence was entirely kept up consistently. The following investigations were carried out in all the fourteeen plants Acacia nilotica, Azadirachta indica, Calotrophis procera., Cassia auriculata, Delonix regia.Hook., Dalbergia sissoo., Ficus benghalensis, Ficus carica, Hibiscus rosasinensis, Lantana camara. L., peltophorum ferrugineum, Benth, Polyalthia longifolia, Pongamia pinnata.L and Syzgium cumini. For photosynthetic study the chlorophyll pigments (Chlorophyll a, chlorophyll b and total chlorophyll) were studied and biochemical changes in leaves (Starch, phenols, and sugars- total, reducing and non-reducing) were studied. Air pollution tolerance index, PH, Relative Humid Content, Ascorbic Acid Content, Determination of the antioxidant enzymes like CAT, POD, PPO and air quality parameters like NOX, SO2, PM10, TSPM were studied. Meteorological data of AT, RH, BP, SR, VWS, WS, WD were studied.