What are the uses of oxygen ?

1) Uses of Oxygen

• Obviously, oxygen is important for human respiration. Therefore, oxygen therapy is used for people who have trouble breathing due to some medical condition (such as emphysema or pneumonia).
• Oxygen gas is poisonous to bacteria that causes gangrene. Therefore, it is used to kill them.
• Carbon monoxide poisoning is treated using oxygen gas.
• Near pure oxygen is used in space suits so that astronauts can breath. Scuba tanks also contain oxygen, although it usually mixed with regular air.
• Oxygen tanks are also found in submarines and airplanes (for emergencies).
• Oxygen is used as a step in the production of antifreeze and polyester polymers. The polymers are then used to make plastic and fabrics.
• Rockets use liquid oxygen to burn fuel and generate lift.
• Most commercially produced oxygen is used to convert iron ore into steel.
• Scientists use the ratio of two isotopes of oxygen (oxygen-18 and oxygen-16) in skeletons to work out what the climate was like thousands of years ago.
• Pure oxygen is used to ensure the complete combustion of different chemicals.
• Oxygen is used to treat water and cut and weld metals.