After 40 years of reporting on the world's most pressing ecological crises, you might expect Fred Pearce to be a cynic. Instead, he’s one of our greatest advocates for hope.

If you follow the news about the environment, it’s easy to feel a sense of impending doom. We hear about accelerating extinctions, collapsing water cycles, and climate tipping points. But my guest today, environmental journalist Fred Pearce, says that if you look at the "ground-truth"—the stories of nature and people he has encountered—there is a surprising, even radical, case for hope. His work has taken him to more than eighty countries, from the logging concessions of Borneo to the radioactive exclusion ...