The major pollutant from automobile exhaust is...

Correct option is B

The major pollutant from automobile exhaust is Carbon Monoxide (CO), a colorless and odorless gas that is highly toxic.

Information Booster:

1. CO is produced due to incomplete combustion of fossil fuels in vehicles.
2. It reduces the oxygen-carrying capacity of the blood by binding with hemoglobin.
3. High levels of CO exposure can lead to poisoning and even death.
4. Other pollutants include hydrocarbons, nitrogen oxides (NOₓ), and particulate matter.
5. Modern vehicles use catalytic converters to reduce emissions.
6. Strict vehicular emission standards, like BS-VI norms in India, are in place to control pollution.

Additional Knowledge:

• NO: Nitrogen oxides contribute to smog and acid rain but are less toxic than CO.
• SO₂: Mostly emitted by industries, not vehicles.
• CO₂: A greenhouse gas contributing to climate change but not directly toxic.

Key Points:

• Vehicular pollution is a significant source of urban air pollution.
• Electric and hybrid vehicles are seen as a solution to reduce CO emissions.