Lauren McCullough, an associate professor of epidemiology at Emory University's Rollins School of Public Health, and Leah Moubadder, a second-year doctoral student at Rollins, discuss research that sheds light on the connection between redlining in Atlanta and air pollution.

Plus, Cynthia Tucker, a Pulitzer Prize-winning journalist and resident at the University of South Alabama, and Frye Gaillard, a historian and resident at the University of South Alabama, discuss their new book, “The Southernization of America," which examines the role of the South in shaping culture and politics in the United States.