Well, if you've read the news, Mars has soil that can sustain life, i.e. us.
The bad news is, you have to eat asparagus for your whole life, if you live there.
Nah, I'm just kidding. Apparently the chemical compounds have been extracted from Martian soil, and the conditions are rather perfect. Like one's backyard soil, according to an unnamed source.
Of course, from a Singaporean's point of view, one question's the definition of 'perfect'. I sure would miss durian if I live in Mars.
Here's the LINK for more info.