Multiple choice

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

  1. Carbon Monoxide.

  2. Carbon Dioxide

  3. Oxygen

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

Carbon monoxide is a colorless, odorless gas produced by the incomplete combustion of fuel in vehicle engines. It is a major pollutant and is toxic to humans.

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