"Eliminating water shortages depends on a global attempt to raise water productivity similar to the effort launched a half-century ago to raise land productivity, an initiative that has nearly tripled the world grain yield per hectare." –Lester R. Brown, World Facing Huge New Challenge on Food Front in Plan B 3.0: Mobilizing to Save Civilization

April 17, 2007
Orville Freeman Lecture by Lester Brown sponsored by the Hubert H. Humphrey Institute, University of Minnesota. Transcript.