Question

part of the greenhouse effect, Earth’s surface radiates heat back into the atmosphere and the atmosphere absorbs this heat. Why do areas near the equator generally radiate more energy back into the atmosphere than areas near the poles?

Areas near the equator have more clouds in the atmosphere than areas near the poles.
Areas near the equator receive more incoming solar energy than areas near the poles.
The greenhouse effect only occurs near the equator.
The greenhouse effect only occurs near the poles.

Answer 1

Areas near the equator receive more incoming solar energy than areas near the poles.

Explanation: sunlight strikes the equator more directly, so the surface there is warmer. A warmer surface emits more longwave (infrared) radiation back to the atmosphere (emission ∝ temperature^4 by the Stefan–Boltzmann law). The other choices are incorrect — clouds vary and don’t explain the basic pattern, and the greenhouse effect operates globally, not only at one latitude.