Freakonomics Radio

Even with a new rat czar, an arsenal of poisons, and a fleet of new garbage trucks, it won’t be easy — because, at root, the enemy is us. (Part two of a three-part series, “Sympathy for the Rat.”) SOURCES:Kathy Corradi, director of rodent mitigation for New York City.Robert Corrigan, urban rodentologist and pest consultant for New York City.Ed Glaeser, professor of economics at Harvard University.Robert Sullivan, author of Rats: Observations on the History and Habitat of the City’s Most Unwanted Inhabitant.Jessica Tisch, New York City police commissioner. RESOURCES:"Increasing rat numbers in cities are linked to climate warming, urbanization, and human population," by Jonathan Richardson, Elizabeth McCoy, Nicholas Parlavecchio, Ryan Szykowny, Eli Beech-Brown, Jan Buijs, Jacqueline Buckley, Robert Corrigan, Federico Costa, Ray Delaney, Rachel Denny, Leah Helms, Wade Lee, Maureen Murray, Claudia Riegel, Fabio Souza, John Ulrich, Adena Why, and Yasushi Kiyokawa (Science Advances, 2025)."The Next Frontier in New