ABSTRACT
The environmental impact of accelerating economic integration between Mexico and the United States is nowhere more apparent than at the border separating the two nations. As the flow of capital, labour and goods passing from one country to the other has intensified, the US-Mexico border region has become a microcosm of an increasingly articulated binational economy. The negative consequences of increased tourist and commercial traffic passing through international border-crossing checkpoints has been acutely perceived on either side of the political dividing line, constituting a ‘transfrontier externality’ (Herzog 1990).
