Mars needs to be smacked with an asteroid to get the outer crust oscillation against the inner core started again, so that it develops a magnetic field.
Then, smash another asteroid with a lot of water, and start oxygen generators
They did that in a movie once. If it saves the life of one triple-breasted midget it is worth it.
3-titted dwarf hooker lived, but Klaatu died.
Where is the justice in that?