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Editorial - Urban Air Pollution Exposure – Measurement, Modeling and Assessment

Exposure to air pollution in city centers is of major concern because of its health-risks to urban dwellers, trafficcorridor users and even to in-transit commuters. The steady growth in traffic is the major source of toxic air pollutants in urban centers these days. Therefore, studying exposure to air pollutants in urban centers is of special interests to environmental health scientists. This special issue is aimed to bring together studies on current practices of measurement and quantification of exposure levels and assessment of the associated risks to humans. The receptor-oriented approach, in which exposure is assessed at the receptor, is of particular importance compare with the conventional source-oriented approach. The articles of this issue engulf the four important aspects of this important topic.