Oxygen in the air we breathe may play a role in triggering lung cancer, new research suggests.
Scientists found that rates of the disease decrease at higher altitudes, where there is less oxygen in the air.
Although oxygen is essential for life, the US researchers suggest the way our bodies process it is potentially carcinogenic.
Oxygen is known to be highly reactive. When cells in the body use oxygen atoms to harness the energy stored in food, they produce a natural by-product called oxygen free radicals.
These free radicals can cause damage to cell structures and DNA, which in turn can trigger cancer.
Read more: How oxygen in the air could trigger lung cancer: Rates of the disease found to decrease at higher altitudes | Daily Mail Online
So what you can do is move to a high altitude location