Question

Which of the following activities increase the concentration of carbon dioxide in the atmosphere?
(i) Deforestation
(ii) Combustion of fuel
(iii) Over hunting

• A. Deforestation
• B. Combustion of fuel
• C. Over hunting
• D. Both A and B

Answer 1

Answer: (D)

Both A and B

Deforestation and combustion of fuel increase the concentration of carbon dioxide in the atmosphere. Deforestation is the excessive cutting down of trees which increases the carbon dioxide concentration in the atmosphere. Fuels burns in the atmosphere in the presence of oxygen. Burning of fuel in the sufficient supply of oxygen leads to the production of carbon dioxide while the insufficient supply of oxygen leads to the production of carbon monoxide.

So, the correct answer is option D.