Which of the following is a non-vehicular pollutant?

Vehicular pollution is the emission of harmful material into the environment by motor vehicles.

Primary pollution from motor vehicles is pollution that is emitted directly into the atmosphere, whereas secondary pollution results from chemical reactions between pollutants after they have been released into the air.

A pollutant is a substance or energy introduced into the environment that has undesired effects or damages to the usefulness of a resource.

Vehicular pollutants are those fuels that emit from the motor vehicles and harm or pollute the environment.

The following are the major pollutants associated with motor vehicles:

1. Carbon monoxide (CO):

   • ​​It is an odorless and colorless gas formed by the combustion of fossil fuels such as gasoline.

   • Cars and trucks are the sources of nearly two-thirds of this pollutant.

   • It blocks the supply of oxygen to the brain and other parts of the human body while breathing.

   • Newborn children and people with chronic illnesses are more susceptible to the effects of CO.

2. Hydrocarbons (HCs) are products of incomplete combustion process which can occur during the operation of the internal combustion engines.

3. Particulate matter: These particles of soot, metals, and pollen give smog its murky color. Among vehicular pollution, fine particles pose the most serious threat to human health by penetrating deep into the lungs.

4. Ozone: The primary ingredient in urban smog, ozone is created when hydrocarbons and nitrogen oxides—both of which are chemicals released by automobile fuel combustion—react with sunlight. Though beneficial in the upper atmosphere, at the ground level ozone can irritate the respiratory system, causing coughing, choking, and reduced lung capacity.

5. Sulfur dioxide: Motor vehicles create this pollutant by burning sulfur-containing fuels, especially diesel. It can react in the atmosphere to form fine particles and can pose a health risk to young children and asthmatics.

Chlorofluorocarbon

• Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
• They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

Conclusion

Hence, we can conclude that Chlorofluorocarbon (CFC) does not use in the vehicles so it is not a vehicular pollutant.