This oral history offers a rare glimpse into the early days of environmental science and policy in the United States. The transcript includes interviews with leading figures in the field, including Luna Leopold, a pioneering hydrologist who helped establish the US Geological Survey's Water Resources Division; and Thomas Dunne, a geomorphologist who played a key role in shaping environmental policy at UC Berkeley. Their insights into the challenges and opportunities of this critical period in American history are both fascinating and enlightening.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.