Many epidemiological studies have demonstrated links between very severe pollution episodes and increased mortality of infants and others. One of the most famous focused on a “killer fog” in London, England and found dramatic increases in cardiopulmonary mortality (Logan and Glasg, 1953). It has been less clear whether levels of air pollution that are common in the . today have effects on infant health. Previous epidemiological research on the effects of moderate pollution levels on prenatal health suggest negative effects but have produced inconsistent results. Chart 1 provides a list of previous studies examining this relationship, limiting our reviewto develop- ing countries that are likely to have comparable levels of pollutions to.
