Question

If CO₂ is absent in the atmosphere of earth then

• A. Temperature will decrease
• B. Temperature will increase
• C. Plants will flourish well
• D. No effect

Answer 1

The correct option is A

Temperature will decrease

The correct option is A.

Explanation of the correct option:

1. The total CO₂ content in the atmosphere is 0.03%, which is balanced in nature with the help of photosynthesis and respiration.
2. When solar radiation falls on the earth, it gets re-emitted in the form of infra-red radiation.
3. Most of the infra-red radiation gets absorbed due to the presence of greenhouse gases like methane and carbon dioxide.
4. Because of these gases, the Earth's temperature remains higher.
5. A continuous rise in CO₂ emissions leads to climate change due to global warming.
6. Hence, if carbon dioxide is removed from the atmosphere, the temperature will fall drastically.

Explanation of the incorrect option:

Option B:

1. The temperature will increase in the presence of carbon dioxide and not in the absence.

Option C:

1. Plants have a major requirement for carbon dioxide during photosynthesis.
2. Hence, plants will not flourish in the absence of carbon dioxide.

Option D:

1. The absence or presence of carbon dioxide matters the most to the environment.
2. Its balance is equally important to the environment.

Final answer: The temperature will decrease if CO₂ is removed from the earth's atmosphere.