Why is it so hard for some people to accept readily verifiable facts? Go to a library and read the Atlas. It's all there. Just be sure you read it correctly and you look at RADIATIVE sunlight reaching the surface as that's what's relevant for the laser discussion.
You are being obstinate. I am not disputing what Cambridge says, I am disputing your application of it.
Cambridge is talking about a whole earth energy balance, not just about the physics of light transmission in air. 22% of all the availavble solar energy is absorbed by clouds over the entire planet, but for a place that doesn't have clouds, that energy has to go elsewhere.
You are using the wrong reference material to back up your theory.