#fog  droplets of water vapor suspended in the air near the ground
  supertype:  aerosol  a cloud of solid or liquid particles in a gas
  subtype:  fogbank  a large mass of fog on the sea (as seen from a distance)
  subtype:  ice_fog__icefog__pogonip  a dense winter fog containing ice particles
  subtype:  mist  a thin fog with condensation near the ground
  subtype:  pea-souper__peasouper__pea_soup__peasoup  a heavy thick yellow fog

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