Chemical exposures vary with social disparities.
http://www.environmentalhealthnews.org/ehs/newscience/2012/03/2012-0313-chemical-exposures-vary-with-social-disparities/
"Socioeconomic status and dependence upon food assistance are striking predictors of the levels of bisphenol A and four perfluorinated compounds (PFCs) found in urine samples gathered during a large U.S. survey. The wealthy had higher levels of PFCs than those who were poorer. Conversely, low income and use of food assistance programs predicted higher levels of bisphenol A."
http://www.environmentalhealthnews.org/ehs/newscience/2012/03/2012-0313-chemical-exposures-vary-with-social-disparities/
"Socioeconomic status and dependence upon food assistance are striking predictors of the levels of bisphenol A and four perfluorinated compounds (PFCs) found in urine samples gathered during a large U.S. survey. The wealthy had higher levels of PFCs than those who were poorer. Conversely, low income and use of food assistance programs predicted higher levels of bisphenol A."