P
PJay_A
Guest
<p>Just like the idea of the upper atmosphere of Venus many miles up consisting the qualities of human-tolerable air pressure and temperature, tunneling deep below the Martian surface would yeild similiar results.</p><p>Eventually, a dig into the Martian interiour would yield atmospheric pressures we humans could live with. Also, the temperature gets warmer and eventually to our liking. Here, we can hollow out enough area to construct a subterrain Martian city-colony, complete with man-made underground lakes and seas. Future expansion of the city is achieved by hollowing out new adjacent sections.</p><p>For air chemistry quality and composition, air going into the tunnels from outside surface can be regulated with filter, placed at each of the tunnels surface entry points. Oxygen and nitrogen, naturally found in the Martian air, would be pulled from the air and allowed to flow freelly inside, while much of the CO2 is filtered and kept out.</p><p>The Martain subsurface is cooler and 25% less dense than Earth's subsurface, making its construction far easier than similiar undertakings on Earth. Of course, it would be wise to use robots to build an inititial habitat before launching an initial population to settle it. Also, farms and vegitation would be required throughout for food and oxygen.</p><p>Being underground, settlers will be safe from those nasty Martian snow and dust storms, and - more importantly - safe from the dangerous radiation levels found on the surface!</p><p>Power could be generated by means of underground thermal electric generator. A spaceport can be built on the surface, where a high-speed vertical elevator can whisk travelers to and fro the city. Also, at surface level, next to the spaceport glass-domed observation decks can be constructed as a tourist attraction for visitors and way to "break free" of the cabin illness residence would likely experience occastionally.</p><p>Lastly, since Mars does not have a molten core, future cities on Mars can be built - anywhere on Mars - and connected with a transportation system that could use a propultion system powered entirely by gravity and would connect any two points on the planet in only about a half-hour travel time no matter how far apart the points are.</p>