It sounds pretty complicated since you can't just get clean air without a lot of work. [And the earth was, apparently, destroyed and unsafe to live on.] I'm not even entirely sure how Cerealia runs since everything outside of the colony makes it impossible to breathe after a while. Some of us can last longer than others but not by much.

[He blinks again because 25 is even older than 23, and it's a whole decade on him.] You'd be surprised. Reaching 25 can be a big deal for some people. [There's a casual shrug but he sure is avoiding eye contact suddenly. It's not too weird. He assumes maybe Bellamy met Tadashi here already. A lot of people knew his brother even before he arrived.] You're still old.