Truth To Power wrote:They can't absorb IR radiation that doesn't reach them because it has already been absorbed by the water vapor and CO2 already present in typical sea-level atmospheric air. I'm not sure which part of that you are having so much trouble understanding.
Again, you seem to be making an error or something is unckear.
We were talking about the air at the surface of the Earth.
You claimed the CO2 and water vapour in the air at the surface of the planet only absorbed a certain amount of infrared radiation and then stopped.
Now you are claiming that the CO2 and water vapour in the air at the surface of the planet stops receiving radiation because the water vapour and CO2 already present in typical sea-level atmospheric air has already absorbed it and is therefore blocking new radiation from coming in.
But that seems to be saying that sea level air is being blocked by sea level air.