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Air Pollution from Motor Vehicles: Standards and Technologies for Controlling Emissions

The usual approach of epidemiological studies is to measure the association between at least one specific pollutant (e.g. PM, NOx, CO or O3) and health outcomes. These specific components are usually highly correlated with other pollutants and are considered indicative of the complex pollutant mixture. It is unclear how much the associations reported in epidemiological studies represent the independent effects of specific pollutants. This correlation means that simply summing the pollutant-specific impacts could lead to an overestimation of the overall impact of air pollution on health. Because of the potential to overestimate the impact of air pollution on health,. | Air Pollution from Motor Vehicles Standards and Technologies for Controlling Emissions Air Pollution from Motor Vehicles Standards and Technologies for Controlling Emissions Asif Faiz Christopher S. Weaver Michael P Walsh With contributions by Surhid P. Gautam Lit-Mian Chan The World Bank Washington .