National Geographic Fellow Sandra Postel views the world through a water lens, advocating for all to make simple and easy changes to their everyday lives that will help "Change the Course" of the Earth’s precious supply of freshwater.
Change the Course: Hope for “Troubled Waters”
By Sandra Postel, originally published by National Geographic
August 16, 2013
Sandra Postel
Sandra Postel directs the independent Global Water Policy Project, and lectures, writes and consults on global water issues. In 2010 she was appointed Freshwater Fellow of the National Geographic Society, where she serves as lead water expert for the Society’s freshwater efforts. Sandra is co-creator of Change the Course, the national freshwater conservation and restoration campaign being pioneered by National Geographic and its partners.
During 2000-2008, Sandra was visiting senior lecturer in Environmental Studies at Mount Holyoke College, and late in that term directed the college’s Center for the Environment. From 1988 until 1994, she was vice president for research at the Worldwatch Institute. Sandra is a Pew Scholar in Conservation and the Environment, and in 2002 was named one of the Scientific American 50, an award recognizing contributions to science and technology.
In 1992 Postel authored Last Oasis: Facing Water Scarcity, which now appears in eight languages and was the basis for a PBS documentary that aired in 1997. She is also author of Pillar of Sand: Can the Irrigation Miracle Last? (1999) and co-author of Rivers for Life: Managing Water for People and Nature (2003). Her article “Troubled Waters” was selected for inclusion in the 2001 edition of Best American Science and Nature Writing. Sandra has authored well over 100 articles for popular, scholarly, and news publications, including Science, Scientific American, Foreign Policy, The New York Times, and The Washington Post.
Tags: Water Supplies, Watershed Planning, Watershed Restoration
Related Articles
Seeds Series Volume 2: How to live through collapse – unmaking a broken system
By Bill Baue, Bill Baue Substack
As civilizational systems buckle under ecological and social strain, this chapter of Seeds Volume 2 argues we must stop chasing solutions and instead dismantle the toxic logics of hierarchy and supremacism to rebuild regenerative, collapse-resilient cultures.
May 27, 2026
The Sahara’s rare floods prompt a rethink of how arid regions manage water in a warming world
By El Habib Ben Amara, Savage Minds
Intense floods in Algeria’s Sahara in 2024 exposed how modern desert cities shed water instead of storing it. Redesigning infrastructure to hold rain, not rush it away, could help turn arid regions into resilient, living landscapes.
May 27, 2026
How preserving local seeds is key to sustaining rural life
By Umed Qurbonbekov, Home Planet Fund
In the remote Tughgoz village in Tajikistan, agriculture is the foundation of daily life. Local seed varieties that once thrived have become rare, so residents launched a community-supported seed initiative to preserve and share traditional seeds before they disappear.
May 26, 2026





