In United States the Eco-Ef®ciency Task Force,
established by the President's Council on Sustainable
Development, has identi®ed four urban areas that
could serve as national prototypes of eco-industrial
development: Brownsville, TX; Baltimore, MD; Chattanooga,
TN; and Cape Charles, VA. All of these
locations are currently at different stages of development.
Each of these parks will focus on different
relationships depending on the market. (`About Ecological
Industrial Parks', 1996).