Experts from the University of Pennsylvania established that lung cancer can be caused by oxygen contained in the air we breathe every day. Oxygen is a necessary ingredient for the functioning of most living organisms on Earth. He can be toxic under certain conditions.
Oxygen free radicals can damage the nuclear material of the cells and induce the development of cancer, say scientists. During analysis of data on the health of the inhabitants of the mountains experts established: the higher a person lives, the less his chance of developing lung cancer.
The fact that with increasing altitude decreases the concentration of oxygen in the air. There is a possibility that oxygen is indeed one of the factors in the development of cancer. Note, there are other, more significant components that form the background for the development of Oncology in the framework of the modern city: Smoking, alcohol, pollution, unhealthy lifestyle.