History Professor Mikael Wolfe discusses Mexico's groundwater depletion and its relationship to migration with NPR
History Professor Mikael Wolfe discusses Mexico's groundwater depletion and its relationship to migration in the article "Mexican state of Guanajuato suffering poor water quality, erosion issues" by Molly Peterson (Take Two, December 19th, 2013).
A herdsman drives cattle in Los Huesos, Guanajuato state, Mexico on April 26, 2013.
AFP/AFP/Getty Images