> If not enough water would be found underground on Mars, that would be really difficult to transport from elsewhere.
I was under the (uneducated) impression that there was a fair amount of water ice locked up in asteroids that are fairly easy to redirect into a Mars capture orbit.
True... I had to look if wiki has some new information, but no - as expected it is frozen ice of co2 and not h2o. Getting that h from somewhere to make water is still going to be an issue on Mars.
