Why is the natural presence of greenhouse gases in the atmosphere not completely harmful for Earth?
Answer and explanation
Correct answer: They help maintain Earth at a habitable temperature
The governing concept is the natural greenhouse effect. Naturally occurring gases such as water vapour and carbon dioxide absorb some outgoing longwave radiation and re-emit part of that energy, helping keep Earth warmer than it would be without an atmosphere. This moderate warming supports liquid water and life. The problem arises when human activities strengthen the effect excessively, not from its natural existence alone. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
They help maintain Earth at a habitable temperature
Why is this the correct answer?
The governing concept is the natural greenhouse effect. Naturally occurring gases such as water vapour and carbon dioxide absorb some outgoing longwave radiation and re-emit part of that energy, helping keep Earth warmer than it would be without an atmosphere. This moderate warming supports liquid water and life. The problem arises when human activities strengthen the effect excessively, not from its natural existence alone. Therefore option A is correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
