William deBuys is a prolific author of books documenting people's relationship to the earth—which is too often destructive. In his new book, The Trail to Kanjiroba: Rediscovering Earth in an Age of Loss, he writes of an expedition to Nepal that he made with a group of doctors and other medical professionals, led by American Zen Buddhist Roshi Joan Halifax, and reflects on what it means to care for an ailing earth as doctors care for patients.