<unk> s are responsible for a number of adverse health effects especially for nursing and pregnant mothers.  Many of these compounds were not known to be harmful until the late 1960s and it was some time before regular testing of<unk>  identified these substances in drinking water sources.
VOC contamination of groundwater
Human biting injuries
Environmental radioactivity
Waterborne diseases
Blood-borne disease
Moral hazard
Motor vehicle accident
Mushroom poisoning