The issue focused on how much water it would take to provide 2,000 families in Tucson, Ariz., with enough water to meet their needs.

The study was led by researchers at University of Arizona, University of Texas-San Antonio, University of Texas-El Paso, University of Texas-San Antonio, University of Texas-El Paso, University of Texas-El Paso, University of Texas-El Paso, University of Texas-El Paso, University of Texas-El Paso, University of