In 1997–1998, when Chiapas experienced a dry, El Nin˜o summer, agricultural production dropped dramatically (Magana Rueda and Mendez Perez, 2002) leading to severe food shortages.
In 1997–1998, when Chiapas experienced a dry,El Nin˜o summer, agricultural production droppeddramatically (Magana Rueda and Mendez Perez,2002) leading to severe food shortages.