<unk>  is a multidisciplinary field involving medicine,<unk>  science, chemistry and others, overlapping with<unk>  pathology. It can be viewed as the medical branch of the broader field of<unk>  health. The scope of this field involves studying the interactions between environment and human health, and the role of the environment in causing or mediating disease. This specialist field of study developed after the realisation that health is more widely and dramatically affected by<unk>  factors than previously recognized.<unk>  factors in the causation of<unk>  diseases can be classified into: *Physical *Chemical *Biological *Social (including Psychological and Culture variables) *Ergonomic *Safety *Any combination of the above In the United States, the American College of Occupational and<unk>  (OCOEM) oversees board certification of physicians in<unk>  (and occupational) medicine. This board certification isn't recognized by the American Board of Medical Specialties.
Environmental medicine
Travel medicine
Environmental health
Sports medicine
Medicinal chemistry
Military medicine
Medicine
Domestic medicine