Plants play critical role in keeping the atmosphere clean. Plants are used in monitoring programme as indicators of air pollution. The response of plants towards air pollution was assessed by Modified Air Pollution Tolerance Index, as plants are primary receptors. The present study was aimed to calculate Modified Air Pollution Tolerance Index (Modified APTI) by adding Free Amino Acids and Tot. Carbohydrates in 15 plants at IDA Nacharam and their ability to tolerate pollution a common stress factor prevailing in the environment to know their tolerance, sensitivity. It was observed that twelve plants were Tolerant, two - Intermediate and 1 was Sensitive. These twelve Tolerant Plants can be used for Green Belt Development.