In 1972, three young scientists wrote the groundbreaking book, "Limits to Growth", a bestseller that said the world was growing at an unsustainable rate. Now, thirty years laters, there is an update to the book. We'll talk with one of the authors, Dennis Meadows about the book's predictions and whether they've played out, and we'll ask what he sees as the biggest growth issues facing the world in the next century.
