Executive summary. The SCERP Tribal Environmental Program = Resumen ejecutivo. El Programa Ambiental de Comunidades Indigenas del CIPAS / D. Rick Van Schoik and Amy Conner -- I. Indigenous groups of Mexico's northern border region / Michael Wilken-Robertson -- II. Indigenous groups of Baja California and the environment / Michael Wilken-Robertson -- III. Strategies for sustainable development of natural and cultural resources in the Paipai Indian community of Santa Catarina, Baja California / Michael Wilken-Robertson -- IV. The development of a geographic information system at Tohono O'odham Nation, Arizona / Phoebe B. McNeally, Biediger, and Daniel McCool -- V. Ysleta del Sur Pueblo Tigua Tribe of El Paso, Texas / Jacob A. Massoud and John A. Peterson -- VI. Iron-rich mine tailings fail to perform as fertilizer: an economic development model / John G. Mexal, Constance L. Falk, April Ulery, Geno Picchioni, richard Ng, Carolyn Taylor, and Ashley Hagen -- VII. Association of gastrointestinal illnesses and environmental factors in a Kumiai Indian community in Baja California, Mexico / Kathleen Coates Hedberg and Richard M. Gersberg -- VIII. Indigenous education: a literature review / Susan L. Williams -- Epilogue. Challenges: Collaborating with tribal nations / Richard Meyers -- Index. A collection of papers commissioned by the Southwest Center for Environmental Research and Policy addresses the social, environmental, and economic problems of Indian tribes in the Mexican-American border region.