A Review on Emissions and Impact of Gaseous Air Pollutant on Agriculture at Varanasi

Abstract

This paper deals with the study of emissions and impact of gaseous air pollutants on agriculture at Varanasi. The variation in air quality in terms of Sulphur dioxide (SO2), Nitrogen dioxide (NO2) and around study site were evaluated over the period of 2013-2014 at four sites daring different seasons. Recent trends have shown decrease in SO2, emissions, but increase in NO2, emission due to more number of automobiles. In past few decades, tropospheric O3, has been identified as a most important air pollutant of a rural areas. Air pollutants produce reactive oxygen species, which adversely affects biochemical processes of plants and reduces their tolerance capacity. An adverse effect caused by air pollutants depends not only upon its concentration, but also on combination of air pollutants. The present review deals with present and future trends of major gaseous pollutants emissions and their impact on crop performance.