Which of the following statements is/are true ?
I. Deforestation reduces the amount of CO₂ in the air.
II. CO₂ binds the heat and does not allow it to be released into the air.

Only II

The correct answer is Option (4) - Only II

The correct statement is: Only II.

Explanation:

I. Deforestation reduces the amount of CO₂ in the air.

• This statement is false. Deforestation involves the cutting down of trees, which are important for absorbing and storing carbon dioxide (CO₂). Removing trees contributes to an increase in CO₂ levels in the atmosphere because trees play a crucial role in carbon sequestration.

II. CO₂ binds the heat and does not allow it to be released into the air.

• This statement is true. Carbon dioxide (CO₂) is a greenhouse gas that contributes to the greenhouse effect. It absorbs and re-emits infrared radiation, trapping heat in the Earth's atmosphere. This phenomenon helps maintain a certain level of warmth on Earth.

Therefore, the correct answer is Only II.