Seriously? They require a mined resource for oxygen? Outpost 1 is a prime example of why you don't have scientists directly invloved in a game's production.
I have to give credit to CK9 for this.. and I agree, to much colony involvement, no much mining, not short enough build time...
*goes of to mine for oxygen*
*you prospect the mountain peak*
*this mountain contain nitrogen*
WTF am i supposed to do with this?