XPost: sci.space.policy, sci.physics   
      
   In sci.physics Jeff Findley  wrote:   
   > In article <57fdbe2c$0$34569$c3e8da3$dbd57e7@news.astraweb.com>,   
   > jfmezei.spamnot@vaxination.ca says...   
   >>   
   >> On 2016-10-11 19:10, Jeff Findley wrote:   
   >>   
   >> > False, Mars has a mostly CO2 atmosphere, albeit a very thin one.   
   >>   
   >> 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).   
   >   
   > So it's not a problem to grow plants if you build a pressurized   
   > greenhouse.  Pretty much everyone knows that.  It was even in book and   
   > movie "The Maritain".   
   >   
   >> 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.   
   >   
   > So, just like the base at the South Pole.  Note how long it's been   
   > permanently staffed!   
   >   
   > Jeff   
      
   There are no colonies at the South Pole and the research stations   
   cost a lot of money to maintain but nowhere near what a research   
   station on Mars would cost.   
      
      
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