Foreword. Acknowledgements. Introduction. I. Law, Politics, and Institutions for a Border Environment. Improving Institutional Response to Environmental Problems; M.J. Spalding. Impact of Two NAFTA Institutions on Border Water Infrastructure; N. Carter, L. Ortolano. Binational Cooperation and the Environment at the U.S.-Mexico Border: A Mexican Perspective; R.A. Sanchez. II. Characteristics of the Border Community. Characteristics of Border Communities; C.L. Gianos. 'Off the Backs of Others': The Political Ecology of Credit, Debt, and Class Formation and Transformation Among the Colonies of New Mexico and Elsewhere; C. Velez-Ibanez, et al. Immigration, Agriculture and the Border; P. Martin. Ill. Border Water. Financing Bilateral Water Projects on the U.S.-Mexico Border: Past, Present and Future; G. Frisvold, M. Caswell. Lessons in Transboundary Resource Management from Ambos Nogales; S. Levesque, H. Ingram. Changes in Trade Policy and Wastewater Emissions for a Border Watershed; L. Fernandez. Urban Geography and the Colorado River Delta -- A Case Study of Transbasin Diversions and Urbanization in Baja and Southern California; S. Michel. Restoring Instream Flows Economically: Perspectives from an International River Basin; J.F. Booker, F.A. Ward. IV. Air Pollution, Transportation, Energy, Hazardous Materials. Solving Transboundary Air Quality Problems in the Paso del Norte Region; C.A. Rincon. Border Congestion, Air Quality and Commerce; R.W. Halvey. U.S. Transportation Responses to NAFTA: A Window on U.S.-Mexico Transport Issues; G.-C. Sciara. The US-Mexico Border Energy Zone; M.J. Pasqualetti. Whither Hazardous-materials Management in the U.S.-Mexico Border Region? R. Varady, et al. V. Biological Resources, Terrestrial and Aquatic Habitat Protection. Divergence in Californian Vegetation and Fire Regimes Induced by Differences in Fire Management across the U.S.-Mexico Boundary; R.A. Minnich, E. Franco-Vizcaino. Whales and Shared Coastal and Marine Management of the Border Pacific; M.J. Spalding. Sea Turtle Conservation across the Shared Marine Border; P.H. Dutton, et al. Migration of Exotic Pests: Phytosanitary Regulations and Cooperative Policies to Protect U.S. Ecosystems and Agricultural Interests; L. Lynch. Conclusions.