Some entry points into the field of contamination and obesity:
Heindel, JJ. 2003. Endocrine Disruptors and the Obesity Epidemic. Toxicological Sciences 76: 247-9.
Chemical exposures. Origins of Obesity. 2004. Environmental Health Perspectives 112(6).
Obesity: Developmental Origins and Environmental Influences. A web-cast of a day-long symposium at Duke University sponsored by the National Institute of Environmental Health Sciences. Some key presentations:
Baillie-Hamilton, PF 2002. Chemical toxins: A hypothesis to explain the global obesity epidemic. J. Alt. and Comp Med. 8, 185–192
Masuno, H, T Kidani, K Sekiya, K Sakayama, T Shiosaka, H Yamamoto and K Honda. 2002. Bisphenol A in combination with insulin can accelerate the conversion of 3T3-L1 fibroblasts to adipocytes. Journal of Lipid Research 3:676-684.
Newbold, RR, E Padilla-Banks, RJ Snyder and WN Jefferson. 2005. Developmental Exposure to Estrogenic Compounds and Obesity. Birth Defects Research (Part A) 73:478–480.