Select one answer below to fill in the blank for Answer A:
About 29 percent of the solar energy that arrives at the top of the atmosphere is Answer A back to space by clouds, atmospheric particles, or bright ground surfaces like sea ice and snow. This energy plays no role in Earth’s climate system. About 23 percent of incoming solar energy is Answer B in the atmosphere by water vapor, dust, and ozone, and 48 percent passes through the atmosphere and is Answer C by the Answer D.