This question <81|74> overall <81|83> Hans: <80|85>.  
  Question 157: Describe a situation in which something which was not produced as a commodity is converted into a commodity through the exchange.   
  [82] Hans: Air   Just a brief remark about CSM's [81]. Air does not become compressed air through exchange, but by the action of the compressor, which needs energy, maintenance, and which has to be produced itself. This is what the customer pays for. Compressed air is an ordinary commodity like every other.   
 
 
 
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