A most intriguing question, and one that leads to many debates both inside and outside of the environmental health field, is a definition of environmental health. The answer given is often tempered by one's political slant (i.e., liberal, moderate, or conservative) and by one's professional training (e.g., public health sanitation, chemistry, nursing, ecology, planning, public administration, etc). Although agreement is needed to effectively address the challenges in the field, disagreement often centers on what constitutes environmental health and even on the name or nickname that should be applied to individuals whose primary focus is on one or many aspects of environmental health.