Oxygen is called “PRAANA VAAYU” which means “LIFE GAS”. ALL living organisms need Oxygen to survive; basically no life can thrive without Oxygen beyond a few minutes. Atmospheric Air on Earth is mostly Nitrogen & only about 21% is Oxygen. For Medical purposes Oxygen Concentration should be more that 99% purity. COVID19 induced complications has increased he requirement for Medical Oxygen in India & People are dying in Hospitals all over the Country due to lack of this precious commodity. Maybe this is the beginning of Apocalypse!