Generating Oxygen on Mars?

Oh I fully believe we will eventually put humans on Mars. But don't underestimate the level of difficulty involved and, once there, it will be even longer, if ever, before humans can walk about on the surface without serious atmospheric and radiation protection.

Mars current atmosphere density is barely 1 percent of Earth ? So no Ozone layer.
 
Mars current atmosphere density is barely 1 percent of Earth ? So no Ozone layer.
I think the lack of magnetosphere is probably more significant than no ozone. But it all adds up to a place that humans will probably never really be comfortable; providing both atmosphere and radiation protection is probably unlikely for millennia at least and maybe/probably never.
 

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