The Impact of So2 Pollution on Agricultural As Well As Physiological and Ecological Dynamics At Both the Individual and Community Scale. Lentil Is a Prominent Source of Protein In India. Plant Species That Produces Pods Such As Lentil and Dry Pea Are Adversely Affected By the Presence of Sulphur Di-Oxide Resulting In a Reduction In Their Overall Output. In Present Study Chlorophyll Content Extracted from Lentil Plant Leaves Treated With Different Concentration of So2 and Prepared Sample Were Exposed to a Range Of Light Having Different Wavelength and Analyzed Using a Spectrophotometer and Calculation of Chlorophyll A and B Using By Arnon Method (1949). It Is Concluded That Chlorophyll Content Was Higher In Low Concentration and Reduced Gradually With Higher Concentration.