XPost: sci.space.policy, sci.physics   
   From: invalid@invalid.com   
      
   On 10/12/2016 2:46 PM, Fred J. McCall wrote:   
   > JF Mezei  wrote:   
   >   
   >>   
   >>From a plant life point of view,  it si doubtful you could get plants to   
   >> grow "outdoors". And if your plants are indoors, the CO2 they will get   
   >> will come from humans, not outside air (since the indoor habitat will do   
   >> everyuthing to keep that nasty CO2 out).   
   >>   
   >   
   > Wrong.  CO2 from humans will go into scrubbers.   
      
   wrong, no way to clean scrubbers on Mars.   
      
   >   
   >>   
   >> It would be extremnely challenging to develop sustainable human presence   
   >> on Mars of the type seen in Total Recall or even Babylon 5.   
   >>   
   >   
   > For some moderate value of 'extremely'.   
      
   it is still too costly, and there is no payoff, just rocks and sand in a   
   vaccum   
      
   >   
   >>   
   >> The problem with Mars is that initial settlers will be dependent on   
   >> Earth for ALL their supplies for a long time, and it will be even longer   
   >> time before they start to have ability to manufacture goods locally from   
   >> locally mined iron/aluminium/coal etc.   
   >>   
   >   
   > No.  There will be some things that will be locally produced in fairly   
   > short order.   
      
   name any of them.   
      
      
   > There will be some things that will probably have to be   
   > imported for a very long time.  There will have to be some new   
   > industrial processes, since there will be no coal.   
      
   no need, no reason to go to mars.   
      
      
      
   >   
   >>   
   >> In fact, is there any information on whether mining for minerals can be   
   >> done on mars ? Would there be veins of iron, bauxite, gold or some coal   
   >> wrth digging for ?   
   >>   
   >   
   > Sufficient amounts of various metals for initial development are   
   > available without having to do much in the way of mining.  Ores can   
   > just be scraped up off the surface.   
      
   so you have been there ? or are you just makeing stuff up ?   
      
      
   >There's never going to be any   
   > coal, though.   
      
   NSS.   
      
   >   
      
   >>   
   >> Or could mars be just one big rock where m,inerals needed for   
   >> industrialisation would be distributed evenly everywhere with no high   
   >> concentration worth digging for ?   
   >>   
   >   
   > Mars has had active volcanism and flowing water, so ores will have   
   > formed.   
      
   water is conjecter, not verified.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)