Of course, they also need separate CO2 scrubbers to keep the air breathable, which consume a lot of power, use caustic and hazardous chemicals, and make the who

Of course, they also need separate CO2 scrubbers to keep the air breathable, which consume a lot of power, use caustic and hazardous chemicals, and make the whole ship smell pretty bad. An artificial leaf that removed CO2 without these downsides might justify a refit.