This paper reviews the Copenhagen Consensus 2008 Challenge Paper on Air Pollution by Bjorn Larsen, Guy Hutton and Neha Khanna. The challenge paper addresses the impacts of air pollution in both indoor and outdoor environments; however, the perspective paper is limited to outdoor urban air pollution. In this challenge paper, section I provides an introduction and overview of air pollution. Section II is a brief commentary on the challenge paper. Section III elaborates the views and outlines alternative or additional ways for achieving a more cost effective and sustainable outcome regarding air pollution control, especially in developing countries.