Oxygen we cannot survive for a second. Our organs produce energy from food with the help of respiration.
Oxygen is available in High Pressure Seamless Cylinders to be use in Hospitals for Patients who cannot breath and during the operations. Oxygen is used by mountaineers during climbing and army soldiers who posted at high latitudes It is also used in diving, astronauts, it is also available in formation of water (H2O).
Oxygen and Acetylene gas combination normally known Oxy-Acetylene Flame is used for cutting and welding in commercial Industries.