"Besides my breath, researchers at Harvard's School of Public Health examined my blood, hair, urine, toenails and bones. It's all in the name of the emerging science of body burden, a concept referring to the amount of chemicals that accumulate in the human body.
As it turns out, I am polluted. Everyone is to some degree. But as the list of toxic chemicals identified in people continues to grow, scientists are trying to figure out what the implications are for human health."