Globally, poor air quality is estimated to cause some 7 million deaths each year, as it increases the risk of a wide range of cardiovascular and respiratory diseases. Yet the exposure to and impact of air pollution are not equally distributed. Air pollution is particularly prevalent in industrializing developing economies. Less stringent air quality regulations, the prevalence of older polluting machinery and vehicles, subsidized fossil fuels, congested urban transport systems, rapidly developing industrial sectors, and cut-and-burn practices in agriculture are all contributing to heightened pollution levels. The lack of affordable quality healthcare services further increases air pollution related mortality.