Sulphur Content in Foliage of Roadside Native Plants and Soil along The Main Super Highway in The Outskirts of Karachi

The levels of sulphur in the foliage of Calotropis precera, Prosopis juliflora and Senna holosericea and the soil samples collected near the super highway was mostly highest as compared do the other distances. With increase in the distance from the road, the levels of sulphur decreased. In few cases, there was little correlation between the concentrations of sulphur and the distance from the highway but the results were insignificant. Automobile activities has been considered as one of the cause of sulphur pollution along the roads.