Basic Introduction information from Wikipedia:

Environmental health has been defined in a 1999 document by the World Health Organization

(WHO) as:

Those aspects of the 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 and affect health.

Environmental health as used by the WHO Regional Office for Europe, includes both the direct

pathological effects of chemicals, radiation and some biological agents, and the effects (often

indirect) on health and well being of the broad physical, psychological, social and cultural

environment, which includes housing, urban development, land use and transport. [1]

As of 2016 the WHO website on environmental health states "Environmental health addresses

all the physical, chemical, and biological factors external to a person, and all the related factors

impacting behaviours. It encompasses the assessment and control of those environmental

factors that can potentially affect health. It is targeted towards preventing disease and creating

health-supportive environments. This definition excludes behaviour not related to

environment, as well as behaviour related to the social and cultural environment, as well as

genetics." [2]

The WHO has also defined environmental health services as "those services which implement

environmental health policies through monitoring and control activities. They also carry out

that role by promoting the improvement of environmental parameters and by encouraging the

use of environmentally friendly and healthy technologies and behaviors. They also have a

leading role in developing and suggesting new policy areas.