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Text File  |  1992-09-02  |  238b  |  8 lines
  1. Permafrost is the condition in which a deep 
  2. layer of soil does not thaw out during the 
  3. summer. Permafrost occurs under periglacial 
  4. conditions. It is claimed that 26% of the 
  5. world's land surface is permafrost. 
  6.  
  7. Subject by: Vince Pike
  8.