Which of the following is not a greenhouse gas?

The correct option is C Nitrogen. A greenhouse gas is a gas that produces heat in the atmosphere as its concentration increases. It also gets trapped in the environment and cannot leave the internal layer of the Earth’s atmosphere. These gases introduce pollution because they contaminate the environment. Examples of greenhouse gases: Carbon dioxide, Methane, Chlorofluorocarbon, Sulphur dioxide. Whereas oxygen, nitrogen, and argon are not examples of greenhouse gases.