ok so do i want to even bother. default conditions: - 1 inhale - then not a problem can just get oxygen after - balloon inhale - then maybe a problem, if you're inhaling and exhaling it's just xenon and co2. and if you inhale again - ok so apparently 4%+ co2 is pretty bad for you - goal: be able to inhale xenon (w or w/o oxygen) and breath it out into a balloon and inhale it again - understand how much is inhaled vs exhaled vs absorbed - maybe read about anesthesiology - check if i can use some sort of aquarium tech to very shittily recapture some of the xenon - how do scuba rebreathers do scrubbing