For poet Camille Dungy, environmental justice, community interdependence and political engagement go hand in hand. She explores those relationships in her new book, Soil: The Story of a Black Mother's Garden. In it, she details how her experience trying to diversify the species growing in her yard, in a predominantly white town in Colorado, reflects larger themes of how we talk about land and race in the U.S. In today's episode, she tells NPR's Melissa Block about the journey that gardening put her on, and what it's revealed about who gets to write about the environment.