(1) As used in this article, “environmental health” means the area of activity which deals with the protection of human health through the management, control, and prevention of environmental factors which may adversely affect the health of individuals. This activity is concerned with the existence of substances, conditions, or facilities in quantities, of characteristics, and under conditions, circumstances, or duration which are or can be injurious to human health.

  (2) In addition, article 1 contains general definitions and principles of construction applicable to all articles in this code.