Which of the following is NOT an example of a gaseous pollutant in the troposphere?
Oxides of nitrogen
Carbon monoxide
Hydrogen sulphide
Dust particles
Dust particles are not an example of a gaseous pollutant in the troposphere. Gaseous pollutants include oxides of nitrogen, carbon monoxide, hydrogen sulphide, and other gases that exist in a gaseous state. Dust particles are a type of particulate pollutant that exists as solid or liquid particles in the air.