Question

If there is more greenhouse gases in the atmosphere, how much of solar radiation leaves the atmosphere?

Answer 1

less

Step-by-step explanation:

Because those green house gasses act like a blanket that allows short wavelength radiations into the earth and due to interaction with the things in the earth, long wavelength radiations are produced which prevented from leaving the earth by the same blanket. Therefore the more the blankets(green house gasses), the more the radiations are trapped.

Answer 2

The Greenhouse Effect in Nature
However, only around 12% of the solar energy that enters the atmosphere is directly lost to space. When greenhouse gas molecules absorb thermal infrared energy radiated by the surface, a net 5-6 percent of incoming solar energy is transported to the atmosphere.