That violates the First AND Second Laws of Thermodynamics. There is no glass roof on the Earth that traps excess heat as it escapes upward and out into space. Remember, the deeper the ocean – the colder the water – and remember that heat rises – it does not fall."
He is absolutely correct
The only real source of heat is the Sun.
The Sun radiates energy which hits the surface of the earth and becomes heat.
Heat at the surface of the earth might be, let's say 90 degrees at a specific spot.
Heat rises, so the heat at the earth's surface rises and some energy becomes transferred to air above the surface. The heat will eventually be radiated off into space when it rises sufficiently.
AGW theory says that CO2 levels in the upper atmosphere form a thermal blanket which traps heat and prevents some of that energy from radiating off into space.
Temperature in the upper atmosphere is not 90 degrees. It's colder than that.
AGW theory says that the CO2 blanket traps the heat miles above the earth's surface, in a sky where the temperature is, let's say, 45 degrees. Maybe prior to Man's intervention the sky temperature might have been 40 degrees, but our nasty CO2 blanket has made this climb to 45 degrees.
AGW theory says that the trapped heat high in the sky then helps to raise the temperature at earth's surface. That unnaturally high air temperature (45 degrees) now causes the surface temperature (which was 90 degrees) to climb to 93 degrees. Voila! Global Warming!!
Is that the sequence which is being claimed?
Because if that is how it's supposed to be working, then I can see that a body at 45 degrees causing a body at 90 degrees to increase in temperature is a definite violation of the Second Law.
Is this the claim? The proof that greenhouse gases are (excuse me) nothing but hot air?