Which of the following is not the use of natural gas?

Natural gas is a very important fossil fuel as it has many applications. A few of them are-

•  It is used as a source of energy in power generation.
•  It is a much cleaner fuel for vehicles.
•  It acts as a starting material for many other useful substances like hydrogen, carbon, and fertilizers.
• Oxygen is used as life support and Natural gas is not used as life support because it provides carbon dioxide after the combustion process which is not inhaled by humans.

Hence, Natural gas is not used as life support for astronauts.