Environmental health and protection refers to protection against environmental factors that may adversely impact human health or the ecological balances essential to long-term human health and environmental quality, whether in the natural or man-made environment. – National Environmental Health Association
Environmental Health as the ecological balance that must exist between man and his environment in order to entire his well – being concern the whole man not only his physical health but also his mental health and optimum social relations with his environment. In the same way its concern the whole environment from the individual human well-being to the entire atmosphere.