Lack of oxygen clearly plays a major role in causing cells to become cancerous. Dr. Harry Goldblatt, Journal of Experimental Medicine. In all serious disease states we find a concomitant low oxygen state. Low oxygen in the body tissues is a sure indicator for disease. Hypoxia, or lack of oxygen in the tissues, is the fundamental cause of all degenerative disease.
Cancer has only one prime cause.
Dr. Otto Warburg, Two-time Nobel Laureate, Winner of the Nobel Prize for Cancer Research. Starved of oxygen, the body will become ill, and if this persists, it will die. I doubt if there is any argument about that. Insufficient oxygen means insufficient biological energy that can result in anything from mild fatigue to life-threatening disease. The evidence is overwhelming.