A plant is a living machine which reduces air pollution by absorbing particulate matter, gases, and metals through leaves. The main polluting substances, i.e., sulfur oxides, nitrogen oxides, and heavy metals, cause damage to the surrounding ecosystem. In the present study, the air pollution tolerance index values of 36 plant species have been evaluated by analyzing three important biochemical parameters and one physiological parameter. The other biological and socioeconomic parameters of these plant species were also considered along with air pollution tolerance index values for calculating anticipated performance index under the influence of overall pollution stress. Based on these two indices, the most pollution-tolerant and economically valuable plant species have been identified for green belt development in and around an urban industrial area, Durgapur, West Bengal, India. It was revealed that Lagerstroemia speciosa (Jarul), Schleichera oleosa (Kusum), and Thespesia populnea (Pipal) would be the outstanding performers. There are many types of assessment categories which were estimated with respect to air pollution tolerance index and anticipated performance index.