if we want to live without air suits that is
we'll need to prepare a habitat, Sorta like a restoration project, where we import Plants, and animals as we increase oxygen levels ( the planet is Carbon Dioxide in most of the air, PLants take that in, out comes oxygen) but decades just to get the decent number plants to take the oxygen and take and replace it, along with enough plants to sustain it,
Of course before that we would need 100's of satalites to take the suns energy and
A. melt the icecaps
B. warm certian locations time to time to make it life-able
and
C. Open a Base so we can access the plant locations and make sure everything goes well
D. make sure the land is lifeable
After that we would
A. need to get Bugs onto the planet to start the fertilization
B. Control the bug population
and moving on and on almost like making a second Earth until we finally can put humans on there.
Over 100 Years,
it aint what Bush said, for regular people on Mars.

