It's probably well documented but I was trying to put out the fires in a Biology(?) type settlement and in the large building where you have the machines that take and process the samples, just close to the L shaped junction, there is usually a switch for the atmosphere. When I got closer to it, it vanished. Stepped away, it reappeared. Well, just in case anybody is struggling, if you're persistent, you don't need to see it, at a certain place, the indication appears and you can activate/deactivate it. Where do they keep the list of known bus these days, anyway? 