Several factors ranging in seriousness can raise CO2 in blood including respiratory distress, vomiting, hormonal imbalances, medications, and low potassium. You can find more information here: ehow.com/facts_4927805_what-causes-blood....
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.