Mars colonization doesn't make sense though. You can't colonize a planet which is not self sufficient and depends on planet earth.

If you do'nt 'fix' earth why fixing up mars?

space colonization is a fantasy from the era of rapidly growing population. now that the population is shrinking at near-extinction speed, what's the point of it? the Earth is not and will never be as inhospitable to us as dystopian sci-fi depicts. even Antarctica is a better target for colonization that Mars, where the gravity is wrong, the air is poison, and the soil is poison.

Of all the things that aren't going to happen, human's colonizing mars has got to be near the top.