I think that going to mars is really a dumb idea, why would you go knowing that you going to die after few months 
Why would you die after a few months?
Because, Humans may only survive 68 days on Mars, Oxygen levels would start to deplete after about two months.
Do you have your head in the sand the last few years, or are you just gullible? We've had people on the International Space Station for a lot longer than that.