Question

Which of the following steps will lead to a decrease in CO₂ levels in air?

• A. Afforestation
• B. Deforestation
• C. Replacing LPG by coal in the kitchen
• D. Increased use of wood as domestic fuel.

Answer 1

The correct option is A

Afforestation

Explanation for Correct option:

• Greenhouse gases are those gases that trap the heat in the earth's atmosphere.
• Due to this, the temperature of the earth increase which leads to the greenhouse effect.
• Carbon dioxide (CO₂) is one of the greenhouse gases.
• So, as to reduce the level of CO₂ in our atmosphere two methods are followed - first to lower down its emission and secondly to plant more trees i.e., afforestation.
• Trees take the Carbon dioxide from the atmosphere and use it for photosynthesis to produce their food and oxygen.

Explanation for Incorrect option:

• While, deforestation leads to the depletion of trees.
• The use of coal and wood increases the level of CO₂ in the air due to incomplete combustion.

Hence, option (a) Afforestation is the correct answer.