Safety – usually associated with acute injuries, short-term, traumatic exposures
Health – usually directed at chronic exposures, persistent, prolonged, repeated
Industrial Hygiene – "that science and art devoted to the anticipation, recognition, evaluation, and control of those environmental factors or stresses, arising in or from the workplace, which may cause sickness, impaired health and wellbeing, or significant discomfort, and inefficiency among workers or among the citizens of the community"
Environmental Stresses
Chemical – environmental concentrations
Physical – noise, heat, ionizing, etc.
Ergonomic – man-machine interface
Biological – micro living organisms
States of Matter
Solids – definite shape and volume
Liquids – definite volume but no definite shape
Gases – neither definite volume nor shape
