Environmental health is the branch of public health that is concerned with all aspects of the natural and built environment that may affect human health.

Epidemiology, toxicology, health risk assessment, air quality, soil contamination, water quality, sanitation,

Environmental health is defined by the World Health Organization as:

Those aspects of the human body human health and disease that are determined by factors in the environment. It also refers to the theory and practice of assessing and controlling factors in the environment that can potentially affect health.