Columbia subject headings:
Environmental policy--Mexico.
Environmental policy--United States.
Environmental protection--Commercial treaties.
Foreign trade regulation--Environmental aspects--North America.
North American Free Trade Agreement
United States--Commercial treaties.
Harvard subject headings:
Conservation of natural resources--North America.
Environmental policy--Mexico
Environmental policy--United States
Environmental protection--Commercial treaties.
Foreign trade regulation--Environmental aspects--North America.
Free trade--Environmental aspects--North America.
Industries--Environmental aspects--Mexican-American Border Region.
Mexico--Foreign economic relations--United States.
North American Free Trade Agreement
Sustainable development--Canada
Sustainable development--Mexico
Sustainable development--United States
United States--Commercial treaties.
United States--Foreign economic relations--Mexico.
Princeton subject headings: