#contamination__pollution  the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors
  exclusion:  #decontamination
  supertype:  #soiling__soilure__dirtying  the act of soiling something
  subtype:  #dust_contamination  the act of contaminating with dust particles

No statement uses or specializes #contamination; click here to add one.