Published: October 2006
Learn More
In Learn More the National Geographic magazine team shares some of its best sources and other information to expand your knowledge of our featured subjects. Special thanks to the Research Division.

Related Links

U.S. Environmental Protection Agency
This website has many resources about chemicals, pollution, and U.S. regulations.

Agency for Toxic Substances and Disease Registryn
This website provides comprehensive toxicological profiles for many chemicals, including mercury, PCBs, DDT, and others.

American Chemistry Council
Visit the American Chemistry Council to learn more about industrial chemicals and how they are used.

National Report on Human Exposure to Environmental Chemicals
The Centers for Disease Control and Prevention's nationwide assessment of the U.S. population's exposure to environmental chemicals is available here.

Registration, Evaluation and Authorisation of Chemicals (REACH)
Learn more about Europe's new regulations on chemicals and their usage.

Environmental Working Group
Pioneering studies by this environmental organization drew attention to the "body burden" of industrial chemicals.

National Library of Medicine
This website from the National Library of Medicine, a division of the National Institutes of Health, contains a wide variety of specialized information regarding environmental health and toxicology.


Biello, David. "Mixing It Up: Harmless levels of Chemicals Prove Toxic Together." Scientific American (May 2006), 16-17.

Birnbaum, Linda S., and Daniele F. Staskal. "Brominated Flame Retardants: Cause for Concern?" Environmental Health Perspectives (January 2004), 9-17.

Eriksson, Per, and others. "A Brominated Flame Retardant, 2,2', 4,4', 5-Pentabromodiphenyl Ether: Uptake, Retention, and Induction of Neurobehavioral Alterations in Mice during a Critical Phase of Neonatal Brain Development." Toxicological Sciences (2002), 98-103.

Gray, L. Earl, and others."Perinatal Exposure to the Phthalates DEHP, BBP, and DINP, but not DEP, DMP, or DOTP, Alters Sexual Differentiation of the Male Rat." Toxicological Sciences (2000), 350-65.

Hites, Ronald A. "Polybrominated Diphenyl Ethers in the Environment and in People: A Meta-Analysis of Concentrations." Environmental Science and Technology (January 2004), 945-56.

Johansen, Bruce E. The Dirty Dozen. Praeger, 2003.

Kohn, Michael C., and others. "Human Exposure Estimates for Phthalates." Environmental Health Perspectives (October, 2000), A440-42.

Kuriyama, Sergio N., and others. "Developmental Exposure to Low-Dose PBDE-99: Effects on Male Fertility and Neurobehavior in Rat Offspring." Environmental Health Perspectives (February 2005), 149-54.

NGS Resources

Newman, Cathy. "Poison: 12 Toxic Tales." National Geographic (May 2005), 2-31.

Becker, Jasper. "China's Growing Pains." National Geographic (March 2004), 68-95.

Long, Michael E. "Half-Life: The Lethal Legacy of America's Nuclear Waste." National Geographic (July 2002), 2-33.

Mitchell, John G. "Our Polluted Runoff: Widespread as Rain and Deadly as Poison." National Geographic (February 1996), 106-25.

Ellis, William L., Michael Parfit, and others. "The Challenge of Pollution." National Geographic (November 1993), 90-105.