text: Moreover, due to effective preventive work,**extreme exposures at work**that in the past often led to a 
  recognised occupational disease**have been mitigated**, reduced or even eliminated by preventive 
  measures and/or technological changes. Some examples are very loud noise, specific permanent tiring 
  postures, very heavy loads, extreme dust and fume exposure, and reduction or elimination of well- 
  studied highly toxic chemical substances. In short, preventive measures — in particular if legally required 
  — contributed to an overall reduction of the number of workers exposed to extremely ‘unhealthy’ 
  workplace exposures. 