If there were no CO2 in the earth's atmosphere, the temperature of earth's surface would have been:
Correct answer: B. Less than the present
- A. same as present
- B. Less than the present
- C. Higher than the present
- D. Dependent on the amount of O2 in the atmosphere
Explanation
Without atmospheric CO2, the greenhouse effect would be greatly weakened, so Earth's average surface temperature would be lower than it is now. CO2 absorbs outgoing infrared radiation and helps retain heat.
Last updated
Practise Forest Ecology
837 free Forest Ecology MCQs from Forestry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Forestry questions like this
Forestry is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
Related questions
5th June is celebrated as:
A biotic community comprises:
A branch of ecology which is concerned with the study of individual species at all stages of its life cycle in relation to environment is called:
A complex of several species and communities in various stages of succession maintained under similar climatic conditions is known as:
A crocodile had just eaten a lamb when a hawk saw the crocodile attacked it, and consumed it. The hawk is in ecological terms: