Question

Which of the following measures helps in maintaining the balance of oxygen and carbon dioxide in nature?

• A. Discourage carpooling
• B. Encourage cutting down of trees
• C. Use of fossil fuels like petrol and diesel
• D. Use of cleaner fuels like CNG

Answer 1

The correct option is D

Use of cleaner fuels like CNG

• Photosynthesis and respiration are the two main processes that help in maintaining the balance of oxygen $\left({\mathrm{O}}_2\right)$ and carbon dioxide $\left({\mathrm{CO}}_2\right)$ in nature.
• Oxygen is required for the survival of all living beings, then there would be a shortage of oxygen but this does not happen because of plants and trees in nature. They are the oxygen suppliers as they release oxygen during photosynthesis.
• During respiration, carbon dioxide is released into the atmosphere which is used by plants and trees in the process of photosynthesis.

• Option A - Discouraging carpooling will increase the pollution content which is not helpful in maintaining the balance between oxygen and carbon dioxide.
• Option B - Encouraging cutting down of trees will decrease the oxygen level which is not helpful in maintaining the balance between oxygen and carbon dioxide.
• Option C - Use of fossil fuels like petrol and diesel will increase the carbon dioxide level in the atmosphere which is not helpful in maintaining the balance between oxygen and carbon dioxide.
• Option D - The use of cleaner fuels like CNG helps in maintaining the balance between oxygen and carbon dioxide because the burning of these fuels produces very few pollutants and it does not affect the carbon dioxide level.

Hence, the correct option is (D).