Oxygen is used by human and animals for respiration bt nitrogen do not. For consuming nitrogen plants need nitrogen fixation ths occurs on low scale on other hand oxygen is directly used so its cunsumbtion is more then nitrogen. Another important point is that oxygen is used in burning, formation of water etc ths means ratio of cunsumbtion of oxygen is mor then nitrogen.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.