This document contains the presentation by Tarun Gupta, Abhishek Chakraborty on toxic metals influencing continental atmosphere, presented at National climate research conference, IIT Delhi, March 5-6, 2010. Atmospheric aerosols stimulate strong research interest primarily due to their importance in influencing climate over both land and water, and causing deleterious effects on human health. The aerosol effect on climate is very complex, and depends on several microphysical properties, such as composition, size distribution, hygroscopic behavior and other properties. Particle size is one of the key parameters regarding atmospheric aerosol transport, subsequent removal and climatology. For a typical urban environment, the submicron range of diameter PM1 (dp ? 1?m) includes 99.99 % of the total number of particles and 60 % of the total aerosol mass. The study of the aerosol particles and their characteristics has only recently been investigated in different parts of India, covering urban, coastal and continental and oceanic regions. All over the world very few studies have been done exclusively on PM1 and in India almost no study is done exclusively on PM1. Current study was carried out at Kanpur, situated in the heart of Indo-Gangetic Plain (IGP). PM1 mass was collected using an air sampler indigenously developed in our lab and then the collected mass was subjected to chemical analysis. Overall, 100 days of samples were collected (including blanks) spread over the duration of one year. Among the 13 elements analyzed, Co found to be always below detection limit in all the samples and As only detected during winter season. Elements like