XPost: sci.space.policy, sci.physics   
      
   In sci.physics Serigo  wrote:   
   > 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.   
      
   Gravestones.   
      
   >> 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 ?   
      
   He's trying to divert the issue.   
      
   Sure you can make small amounts metals by scrapping the surface, very   
   small amounts. Notice that on the Earth where they do that the "scrapping"   
   goes down a long ways and ends up being a huge hole in the ground?   
      
   >   
   >>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.   
      
   Whether or not water ever flowed on Mars is irrelevant to most minerals.   
      
      
   --   
   Jim Pennino   
      
   --- SoupGate-Win32 v1.05   
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