From: sylvia@email.invalid   
      
   On 01-Mar-21 12:44 pm, JF Mezei wrote:   
   >   
   > People who survive on Mars will be leeches for a long time before they   
   > start to produce anything worth transporting back to Earth.  So Elon   
   > want to make money selling transport to Mars, but who will be willing to   
   > have endless spending to purchase essential goods and then pay SpaceX to   
   > shop them to some colony on Mars?   
      
   It would be even longer before a colony could be self sufficient to the   
   point where it could endure even if some catastrophe wiped out humans on   
   Earth, depriving the colony of any more support.   
      
   Sylvia.   
      
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