oxygen generating hvac

10.30: gear/hvac/oxygen generation:

. instead of worrying about filtering air;

use daytime`solar to turn water into {oxygen, hydrogen},

then use hydrogen for night-time energy,

and inject oxygen whenever low .

. does it matter that co2 is high if oxygen is normal? .

. how does space get water if they are using it for oxygen ?

they could use plants instead,

and they use batt's for night-time .