EHS343 (Not Liberal Arts) Environmental Physiology 3 hrs. 3 crs. The effect of environmental stress on human physiology; modes of production of disease through toxic materials in air, water and food; physical variants of temperature, air pressure, electromagnetic energy, and vibration in the production of disease state. Preq: EHS 211, EHS 212. Not open to the students with credit in HPEH 343.