Andra Chastain gave a keynote lecture at the Institute of Historical Research of the National Autonomous University of Mexico (UNAM) on May 7 in Mexico City. The title of the talk was “El aire urbano: Hacia una historia cultural de la contaminación atmosférica en tres ciudades de las Américas,” and a recording can be accessed at: https://www.youtube.com/watch?v=EW7NwF27MKY&t=579s