Environmental psychology is the study of the way the physical environment affects human psychology and behavior. The premise of environmental psychology is that the human emotional and mental state is profoundly influenced by the physical environment, whether natural or man-made.
Architecture, urban design, agriculture, recreation, transportation and climate science are all areas in which psychologists study the impact of emotions, mental state and behavior of humans. Environmental psychology studies exclusively the physical environment, including material objects, plants, animals and human beings, and how they relate directly to the human individual. Environmental psychology does not study human interactions, which are primarily the focus of other psychological disciplines.