What percentage of solar energy is trapped by CO2 as it leaves our atmosphere?

Answer 1

Actually, zero is the correct answer, given a long enough period of time. If the energy received by the Earth is more than the energy emitted, the Earth's temperature must rise until emitted equals received. If the Earth is emitting more radiation than it receives, its temperature must fall until balance is achieved. Temporary (from nanoseconds to eons) storage of energy causes fluctuations in this dynamic.

Answer 2

Zero. If it leaves out atmosphere, it wouldn't be trapped