Environmental health Environmental health studies and environmental factors in the environment that affect human health, plants and animals. Environmental medicine (in their provision of care) is more focused on disease-producing agents that have been introduced into the environment by man, as well as knowledge of these actors, both preventive and curative purposes. While studyingand treating environmental illnesses, handles much of the research and preventive aspects. Environmental Medicine is a branch of environmental health which provides the effect on human health of physical, chemical, biological, psychosocial, ergonomic and safety. The World Health Organization, such as environmental health points "that discipline which includes those aspects of human health, including quality of life, which are determined by environmental factors, physical, chemical, biological, social and psycho-social.It also refers to the theory and practice of evaluating, correcting, controlling and preventing those factors in the environment that can potentially adversely affect the health of present and future generations ".