you know in about 7900000 years there might be enough oxygen on the planet to support humans :)
How will these trees get water? Something else bothers me too. When Kudzoo was brought to America it almost took over the forrests! When you put something in a different environment, you never know the consequences. It could be beneficial or they could turn into horrible alien swamp things that attack us and suck our brains out!!! ;)
Relocate the UN to Mars. Within 2 weeks of touchdown they'll be enough hot air to build a couple of whorehouses & a bank within walking distance.
I wonder how many illegal Mexicans are gonna sneak onto that ship.
Apparently you never saw "Total Recall." ;)
There is a lot of oxygen locked up in ice at Mars poles and potentially under ground in many other locations on Mars. the trick is eletrolysizing it in significant quantities.
The bigger problem is there isn't a significant magnetic fields around Mars, protecting the surface from certain harmful radiation types.