#ozone_hole__ozonehole  an area of the ozone layer (near the poles) that is seasonally depleted of ozone
  supertype:  #hole.opening  an opening into or through something
  part of:  #ozone_layer__ozonelayer__ozonosphere  a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
     part of:  #stratosphere  the atmospheric layer between the troposphere and the mesosphere
        part of:  #atmosphere.gas  the envelope of gases surrounding any celestial body

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