Special section : Air pollution
Funk, Michael A. ; Ash, Caroline ; Smtih, Jesse ; Uzogara, Ekeoma ; Wible, Brad ; Apte, Joshua S. ; Manchanda, Chirag ; Huang, Wei ; Xu, Hongbing ; Wu, Jing ; Ren, Minghui ; Ke, Yang ; Qiao, Jie ; Mork, Daniel ; Delaney, Scott ; Dominici, Francesca ; Morawska, Lidia ; Li, Yuguo ; Salthammer, Tunga
Air is an essential but invisible resource. When we notice it, it is usually because of suspended dust, smoke, ash, or haze. Such particulates?along with harmful gases, chemical vapors, and suspended biological agents?constitute air pollution. The health and environmental effects of exposure to air pollutants have long been apparent and are now increasingly well documented in terms of overall life expectancy as well as incidence of asthma, cancer, and cardiopulmonary disease. As centers of human industry and habitation, large cities and their immediate surroundings are of particular concern. Sources of air pollution often have outsized impacts on marginalized populations, who may lack the resources to relocate or petition for relief. At the same time, pollutants such as wildfi re smoke can travel long distances and lead to hazardous conditions across political and geographic boundaries. Safeguarding clean air is thus a shared responsibility locally and globally.</p>
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