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Generalbetter than expected Pin
lopatir22-Jan-20 4:29
lopatir22-Jan-20 4:29 
GeneralRe: better than expected Pin
OriginalGriff22-Jan-20 4:52
mveOriginalGriff22-Jan-20 4:52 
GeneralRe: better than expected Pin
DRHuff22-Jan-20 5:29
DRHuff22-Jan-20 5:29 
GeneralRe: better than expected Pin
dandy7222-Jan-20 6:08
dandy7222-Jan-20 6:08 
GeneralRe: better than expected Pin
DRHuff22-Jan-20 6:23
DRHuff22-Jan-20 6:23 
GeneralRe: better than expected Pin
honey the codewitch22-Jan-20 7:11
mvahoney the codewitch22-Jan-20 7:11 
GeneralRe: better than expected Pin
Jacquers22-Jan-20 19:56
Jacquers22-Jan-20 19:56 
GeneralA million of Martians Pin
kalberts22-Jan-20 4:01
kalberts22-Jan-20 4:01 
Last Monday, the CP Daily News brought the link to Elon Musk Says He’ll Put A Million People on Mars By 2050[^]. This set me thinking: Recycling water is quite straightforward. Recycling oxygen not so.

I do not have enough information to even estimate how may tons of oxygen a million humans require a day. (A ton is a million grams, one gram per person.) Can anyone put me on the right track?

Next question: How many plants does it take to produce a ton of oxygen a day? Obviously, a huge pine tree will produce more than, say, a tomato plant. I guess that plants will have to double as both oxygen and food sources; there wouldn't be room of huge forests within that plastic bubble. Do food plants vary a lot in their oxygen prodction capabilities? With Mars being roughly speaking at 1.5 times the Earth's distance from the sun, solar radiation is at 40-45% of Earth levels; I guess that could affect the photosynthesis.

When the type and required number of plants, of various kinds, have been determined, we could try to estimate how much water would be bound in these plants and their soil. Transporting that water from earth would be a major taks. So would be an effort to break it loose from the south pole ice-cap and transport it the 2500 km to equatorial land, melt it and heat it up to a temperature suitable for the plants. With no oxygen available, we can't use diesel trucks for transportation, or any tool requiring oxygen for cutting the ice.

(We obviously could cover half of the Martian surface with solar cells to produce electricity for electrolyzing the south pole ice cap, rather than using the water for growing plants. That is certainly not in the "sustainable" group of alternatives - and how much solar panels would it require? I suspect that the panels would all have to be brought from Earth.)

I really liked the kind of analysis made in The World Without Us[^] by Alan Wiesman, and wish that someone would make a similarly scientifically founded evaluation of the realism of a one million people Mars colony. Well, I suspect that it could easily end up more like Solar FREAKING Roadways, Are they REAL?[^] (i.e. not quite as respectuful as Alan Weisman's approach). Either would be interesting reading!
GeneralRe: A million of Martians Pin
Daniel Pfeffer22-Jan-20 4:18
professionalDaniel Pfeffer22-Jan-20 4:18 
GeneralRe: A million of Martians Pin
kalberts22-Jan-20 4:42
kalberts22-Jan-20 4:42 
GeneralRe: A million of Martians Pin
raddevus22-Jan-20 5:06
mvaraddevus22-Jan-20 5:06 
GeneralRe: A million of Martians Pin
Dan Sutton23-Jan-20 9:56
Dan Sutton23-Jan-20 9:56 
GeneralRe: A million of Martians Pin
Mike Hankey22-Jan-20 4:19
mveMike Hankey22-Jan-20 4:19 
GeneralRe: A million of Martians Pin
Gary Wheeler22-Jan-20 5:50
Gary Wheeler22-Jan-20 5:50 
GeneralRe: A million of Martians Pin
Rob Philpott22-Jan-20 4:25
Rob Philpott22-Jan-20 4:25 
GeneralRe: A million of Martians Pin
Johnny J.22-Jan-20 4:34
professionalJohnny J.22-Jan-20 4:34 
GeneralRe: A million of Martians Pin
DRHuff22-Jan-20 5:35
DRHuff22-Jan-20 5:35 
GeneralRe: A million of Martians Pin
kalberts22-Jan-20 4:35
kalberts22-Jan-20 4:35 
GeneralRe: A million of Martians Pin
Daniel Pfeffer22-Jan-20 6:13
professionalDaniel Pfeffer22-Jan-20 6:13 
GeneralRe: A million of Martians Pin
dandy7222-Jan-20 5:56
dandy7222-Jan-20 5:56 
GeneralRe: A million of Martians Pin
Matthew Dennis22-Jan-20 8:29
sysadminMatthew Dennis22-Jan-20 8:29 
GeneralRe: A million of Martians Pin
MarkTJohnson22-Jan-20 7:53
professionalMarkTJohnson22-Jan-20 7:53 
GeneralRe: A million of Martians Pin
DerekT-P23-Jan-20 2:01
professionalDerekT-P23-Jan-20 2:01 
GeneralRe: A million of Martians Pin
obermd23-Jan-20 3:12
obermd23-Jan-20 3:12 
GeneralRe: A million of Martians Pin
F-ES Sitecore22-Jan-20 4:43
professionalF-ES Sitecore22-Jan-20 4:43 

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