Air pollution is maximum in

Answer: Option D

Air pollution is maximum in automobile exhausts and chemicals from industries.
Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or materials.
Aerosols are produced by human activities such as the combustion of fossil fuels in automobiles, power plants, and numerous industrial processes. Potential contributors to such an outcome include increased burning activities, traffic, agri-food and chemical industries.