ABSTRACT
The North American Free Trade Agreement (NAFTA) is unique among trade agreements in the disparity of economic development among its member countries, with Mexico being much less developed than the other two partners. Because of its lower level of economic development, Mexico has had significantly less stringent environmental protection than either the United States or Canada. Air pollution problems in Mexico City are legendary, and pollution along the Mexican border with the United States has reached deplorable levels by almost any standard.
