AbstractThe existing reviews and meta-analyses ad-dressing unequal exposure of environmental hazards on certain populations have focused on several environmen-tal pollutants or on the siting of hazardous facilities. This review updates and contributes to the environmen-tal inequality literature by focusing on ambient criteria
air pollutants (including NOx), by evaluating studies re-lated to inequality by socioeconomic status (as opposed to race/ethnicity) and by providing a more global per-spective. Overall, most North American studies have shown that areas where low-socioeconomic-status(SES) communities dwell experience higher concentra-tions of criteria air pollutants, while European research has been mixed. Research from Asia, Africa, and other parts of the world has shown a general trend similar to that of North America, but research in these parts of the world is limited. Keywords Environmental justice.
Environmental inequality. Criteria air pollutants.Air pollution. Socioeconomic status.Social disadvantage