Question

Which of the following gases is NOT a major greenhouse gas that causes climate change?
1. Carbon dioxide
2. Methane
3. Carbon monoxide
4. Nitrous oxide

Answer 1

Correct Answer - Option 3 : Carbon monoxide

The correct answer is Carbon monoxide.

• Carbon monoxide is not a major greenhouse gas that causes climate change.
• Carbon monoxide is toxic to animals that use hemoglobin as an oxygen carrier.
• A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range.
• Greenhouse gases cause the greenhouse effect on planets.
• The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

Major Greenhouse gases

Methane	A hydrocarbon gas produced both through natural sources and human activities. Methane is a far more active greenhouse gas than carbon dioxide, but also one which is much less abundant in the atmosphere.
Carbon dioxide	A minor but very important component of the atmosphere. Released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions. Carbon dioxide is the most important of Earth’s long-lived greenhouse gases.
Nitrous oxide	Nitrous oxide, commonly known as laughing gas or nitrous. A powerful greenhouse gas produced by soil cultivation practices. Nitrous oxide is a powerful oxidizer similar to molecular oxygen.