User talk:2A02:F6D:8484:0:7447:F100:222E:8F29

On Proposed Strategies
Although Mars can be made habitable, the prospect of terraforming it into another version of Earth or Earth like planet is not very pheasible.

Yes, the planet can have an added atmosphere, but as this grows, the atmosphere would also be stripped away, this then incurs cost which not even asteroid import can manage. For an atmosphere to be above the Armstrong limit (>0.07 Atm/ 7.000 kPa), would, in the case of Mars, require an aircolumn that is 11+ times the size of it's current atmosphere. Yes this may be achieved temporarily by adding lots of gas, but as the atmosphere increases in size, so does the bleeding. (atmospheric escape) Also, the air column would be in the range of 121 km height. As this height in atmosphere (with subsequent pressure increase) is being tried to be achieved the atmospheric escape will incur over 1.65E+19 m3 of atmosphere, which may happen at a really high rate, much similar to this.

https://exoplanets.nasa.gov/news/202/a-vast-cloud-the-behemoth-trails-a-bleeding-exoplanet/

Needless to say, that even if it happens at a much lower rate, replacing gas in the millions of cubic kilometers, at even a mere 0.05%, would need 82.5 million cubic kilometers of gas, and even if that's 'only' per year, it's still unmaintainable.

The only way Mars can be terraformed is when the surface is sealed and the inside of Mars is used to populate it, which can still be very rewarding, since I myself estimate that, despite the inability to surface terraform an atmosphere on Mars, nearly 60 billion people can live on Mars in decent conditions if the effort is put in and the resources Mars represent are used optimally, with only little imports.

In any closed planetary ecology, any imported material stays in said ecology, until forcibly exported, which means that for instance water, once imported, but not evaporated or used at the surface will stay in the ecology.

Also, for those whom think 60 billion people living on Mars is way too high a number, it would need but a 4 story planet (4 layers) allowing for each person in the population for well over 10.000 m2, or hectare of room. The surface should in that case mostly be used as energy farming through solar, with the dust created in dust storms being the source of the silicon. Over time, the dustiness of the dust storms would decrease due to absence of said dust, while adding solar panels to harvest energy in the exa+watt range, to allow for underground farming, oxygen regeneration and other amenities like grav-sim facilities. In fact using another 5th layer, for the gravity-sim facilities alone would make them better usable, and possibly public property for anyone's use, instead of personal grav-sim. Other means of grav-sim support may be achieved by wearing heavy weight on any suit, which will then also help alleviate the atrophy.

Also for those thinking 60 billion people on Mars is unfeasible, try making feasible the replenishment of 82.5 million cubic kilometers of gas per year.

Also, the would be only sufficient for an atmosphere just above the Armstrong limit.