Chemical substances are found everywhere in our environment. As Chapter 1 makes clear, whether it be at home, outdoors, or in the workplace, we are continuously coming into contact with various chemicals through our air, water, food, cosmetics, clothes, personal care products, and everyday household items (Cooper, Vanderlinden, and Ursitti 2011; Program on Reproductive Health and the Environment 2008). As our detection methods improve, we are increasingly forced to confront the evidence of these exposures: biomonitoring studies now show that nearly everyone has measurable amounts of almost all known toxic chemicals stored somewhere in their bodies (CDC 2013; Environmental Defence 2009; Statistics Canada 2012).