What is the gist of pages 73-77 in unbroken (chapters 7-10)

In his fiction novels Red Mars, Green Mars and Blue Mars Kim Stanley Robinson presents the colonization of the planet mars in three moments. First, in Red Mars the author depicts the colonial voyage aboard the Ares from planet Earth into Mars.

The author then presents the idea of making plants grow on Mars to sustain human beings in the new colonialized plant. Then in Blue Mars Mr. Robinson introduces the formation on all the necessary elements to create the water cycle on the plant and in consequence the formation of seas, rivers, lakes, and other water bodies.  Having mentioned the former we assume that a breathable atmosphere is formed in the fictional scenario in Blue Mars and that taking into account that in Green Mars the author presented the idea of plants growing in the planet, there is no possible objection to the idea of living normally on planet Mars. If we consider the fact that there is an atmosphere, water, and plants in Mars, it would seem that living in Mars is an utterly realistic panorama.