Caroline welcomes Rose George, author of "The Big Necessity, Human Waste and Why it Matters," who, in the tradition of all great women, has journeyed to the Underworld, literally, and returned to tell a story essential to everyone who eats,"up-loads" and thus must "down-load." It is (way past) time to speak about the unspeakable, prima materia in alchemy, and our deteriorating global sanitation infra-structure which poses more risk, causes more death, than anything else we fear. Like the best of reggae – the darker the lyrics, the jauntier the tune, Rose George is a deft, witty and profound contributer catalyst to the conversations and resulting action we all must undertake. www.rosegeorge.com