Pollution caused by automobiles is an example of

Pollution caused by automobiles is an example of Air pollution.

Explanation:

Air pollution is a mixture of solid particles and gases in the air or when harmful substances including gases, particles, and biological molecules are introduced into Earth's atmosphere in excessive quantities.

Vehicles or automobiles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide. Transportation cause almost 27% of green house emission.

Thus, the answer would be pollution caused by automobiles is an example of air pollution.