greenhouse city oxygen production systems
J1A) one of the systems recovered from astronautics is the creation of a "silver electrocalatist" capable of converting carbon dioxide (co2) into carbon monoxide (co) as an oxygen atom (O) by-product
J1B) system for reproducing oxygen with artificial leaves
J1C) photosynthesis
J1D) oxygen production external to greenhousecitys
J1E) elimination of citizens for energy saving