  Environmental pollution, comprising of air, water and soil have emerged as a
serious problem in past two decades. The air pollution is caused by
contamination of air due to various natural and anthropogenic activities. The
growing air pollution has diverse adverse effects on human health and other
living species. However, a significant reduction in the concentration of air
pollutants has been observed during the rainy season. Recently, a number of
studies have been performed to understand the mechanism of removal of air
pollutants due to the rain. These studies have found that rain is helpful in
removing many air pollutants from the environment. In this paper, we proposed a
mathematical model to investigate the role of rain in removal of air pollutants
and its subsequent impacts on human population.
