Q. Consider the following statements regarding the emission of energy absorbed by the Earth:

1. The Earth radiates all absorbed energy as long wave terrestrial radiation.
2. The Earth radiates all absorbed energy as short wave terrestrial radiation.

Which of the above statements is / are correct?
Answer: Only 1
Notes: The Earth emits the energy it absorbs from the Sun as long wave terrestrial radiation due to its relatively low surface temperature. Water vapour and carbon dioxide absorb this energy in the atmosphere. Short wave radiation refers to solar energy received by the Earth, not the energy re-emitted by it. Hence, only statement 1 is correct.