Seems like one of the several different methods of synthesizing oxygen (from what I've read) could easily be refined over the next few hundred years, resulting in a portable device that humans could wear to create oxygen for individuals, or even big enough to supply a building.
"At that point it'll be the end of the road for human beings and most other life forms that rely on oxygen to get through the day, so let's hope we figure out how to get off the planet at some point within the next billion years."
Comments
Always has to be a catch.....
https://ktla.com/news/nationworld/nasa-reports-increased-chance-of-city-killer-asteroid-hitting-earth/
See everything is going to be just fine 😯