Abstract:
As the population and C02 level in urban areas are increasing day-by-day, attention should be given to identify sources, sinks and influence of CO? in urban areas. This research focuses on identifying a possible natural or artificial barrier to reduce urban C02 concentration, mainly produced due to the urban trafficThe study was done along byroads in Ratmalana, Dehiwala and Wellawatta urban areas and the C02 variation these roads were compared with the physical features besides these roads. The results of this study rerega 'relationship between physical features and C02 variation along byroads. Vegetation cover, arrangement of the buildings and the building size are very much related with the C02 variation along byroads. Presence offc-vegetation fences rather than walls beside the roads and more space between buildings help to reduce a
significant amount of C02 concentration. Existence of high buildings and high walls increase C02 concentration non at those locations.
