Based on specific stress-strain relations, deficits are shown to exist in the energy or dose equivalent rating of mechanical whole-body vibrations, UV radiation, and carbon monoxide exposures. Due to the fact that repair mechanisms are time-dependent, it must be assumed for the upper and lower rating range that effects on the human body cannot be approximated via an equivalency relationship. To summarize the current state of the ergonomic rating of environmental exposures which is of high importance for preventative work safety, the rating of mechanical whole-body vibrations can be seen in a positive light. Substantial work remains to be done in the rating of UV exposures in the workplace. The rating of CO exposures in the workplace can be considered ergonomic if the tolerable exposure time is not exceeded. If, however, a prolonged exposure time in high concentration occurs, the traditional rating implies even risks of a fatal organ concentration.