I have a good friend who is an environmental engineer. He specializes in air quality control and works for a firm which helps corporations comply with EPA standards and helps train EPA personnel in various aspects of monitoring, as well as many other aspects of the relationship between government and industry with respect to environmental matters.
Human ecology is treated by geography, sociology, economics, and environmental law.
Environmental psychology studies the effects of the environment on human behavior. There is a growing need for teachers in environmental education. Also, environmental medicine and epidemiology or toxicology might be interesting career choices. Argonne National Laboratory, Division of Educational Programs, Harold Myron, Ph.D., Division Director.