In the new book Chasing Chiles, three American chile-lovers examine the health of our agricultural and farming systems through the lens of the iconic chile pepper - from the viewpoints of the farmers who cultivate the crops, to the cuisines and cultural traditions in which peppers play a prominent role. Today we hear from co-author and ethno-botonist Gary Paul Nabhan.

Rewilding is the international effort to save species by restoring habitats, reviving migration corridors and helping humans and the wild coexist. Four decades after celebrating the first Earth Day, today we talk with journalist and author of Rewilding the World: Dispatches from the Conservation Revolution, Caroline Fraser.

On this week's Voices of Our World join us as we examine the often overlooked relationship between our environment, disasters, and conflict. Our guests are David Jensen, the policy and planning coordinator for the United Nations Environment Program (UNEP), and UNEP communications advisor Silja (Celia) Halle.