Multiple choice

The major harmful gas emitted by automobile vehicles which causes air pollution is _____.

  1. Carbon Monoxide

  2. Methane

  3. Carbon dioxide

  4. Ozone Gas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon Monoxide (CO) is a major harmful pollutant emitted by automobile engines, especially when fuel combustion is incomplete. CO is highly toxic to humans because it binds to hemoglobin more readily than oxygen. While automobiles do emit CO2 and other pollutants, CO is specifically associated with acute health risks from vehicle exhaust.

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