Dirt: An Interview with David Montgomery SEATTLE (KPLU) - There are few things so taken for granted as the soil beneath our feet. But historically, civilizations have paid a high price for treating their soil like dirt. University of Washington professor David Montgomery has written "Dirt: The Erosion of Civilizations," about the role soil erosion plays in how societies flourish - and fail. Montgomery tells KPLU environment reporter Liam Moriarty that, for all our 21st century technology, we still rely on dirt. © Copyright 2009, KPLU