Give the environment effect of three polluting gases with a reason why nitrogen is not considered a polluting gas.

Environment effect of three different polluting gases:

1. Sulphur dioxide — cause respiratory problems
2. Nitrogen dioxide — initiates acid rainfall
3. Dust & smoke particles — causes respiratory problems and precipitates rain.

Nitrogen is not considered a polluting gas for the following reasons:

1. It is an inert or unreactive gas.
2. It is utilized by plants for their growth and development.
3. It controls combustion by diluting the activity of oxygen.
4. It is not a greenhouse gas and does not contribute to global warming.