Re: Plenty of oxygen on the Moon
Obviously we need fertilizer for our crops. Initially the rocket fuel plant will provide a large portion of our buffer gases(Nitrogen and argon being roughly 5% of the atmosphere). Trace elements such as phosphorus and sulfur are available in the Martian dust(Ideally we will find more concentrated sources but we have the elements we need). While I haven't fully examined everything need to make fertilizer all of the ingredients are available on Mars.
Yes, plants require oxygen. That doesn't really matter. Food crops will provide roughly twice the oxygen humans need. Crops grown for other purposes, fibers like cotton for textiles and cellulose for plastics production, further enhance the oversupply of oxygen. Inside we have far too much total oxygen. The little bit plants require is already available so there is no reason to be overly concerned.
Outside we already plenty of oxidizers available. What we really need on Mars is fuel.
Biting the hand that feeds IT
