Ten years ago, University of Washington professor David Montgomery published his influential book “Dirt: The Erosion of Civilizations.” One year later, he received a MacArthur Genius fellowship, and continued his research in geomorphology: “the branch of geology that is concerned with the structure, origin, and development of the topographical features of the earth's surface.”

Montgomery is still working to raise awareness of the crucial roll dirt plays in human survival, especially when it comes to soil degradation. His new book is “Growing a Revolution: Bringing Our Soil Back to Life.”

David Montgomery spoke at Town Hall Seattle on May 9. Sonya Harris recorded his talk.

Listen to the full version below: