Re: Even if you were right about the CO2 ...
...it has no bearing on whether or not liquid water can exist on Mars for biologically significant time scales today. H2O snow was observed at the Viking 2 landing site for over 200 days on Mars. If there is as much H2O ice as Mars Odyssey is reporting there is -- then liquid water exists too. It may not be rivers, lakes or streams today, but its there. The laws of physics says it is.
BD