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In this week\u2019s episode, host Daniel Raimi talks with Travis Roach, an associate professor and director of the Central Policy Institute at the University of Central Oklahoma, about how the prevalence of air pollution may increase the incidence of fatal traffic accidents in the United States. Roach discusses the characteristics of airborne particulate matter that is 2.5 microns in diameter or less, which is air pollution known as PM2.5; the sources of PM2.5, including coal- and natural gas\u2013fired power plants, vehicle tailpipe emissions, and wildfire smoke; the negative effects of PM2.5 exposure on physical health and cognitive functioning; and policies and technologies that can help reduce public exposure to PM2.5.\n\nReferences and recommendations:\n\n\u201cNegative Externalities of Temporary Reductions in Cognition: Evidence from Particulate Matter Pollution and Fatal Car Crashes\u201d by Anne M. Burton and Travis Roach; https://annemburton.com/pages/working_papers/Burton_Roach_Pollution.pdf\n\nPurpleAir sensors and maps that measure air-quality data\n\n\u201cPrairie Up: An Introduction to Natural Garden Design\u201d by Benjamin Vogt; https://www.press.uillinois.edu/books/?id=p086779