Steve Burgess loves to travel, but he also sees how tourists are taking a toll on the places they visit. He joins us to discuss his new book, Reservations: The Pleasures and Perils of Travel.

Ottawa is hosting negotiations to hammer out a global treaty on plastic pollution, which is showing up in every corner of the earth — and even in human blood and breastmilk. Guest host Mark Kelley asks Nestle’s Jodie Roussell what her company is doing to curb the problem; and talks to scientist...