Thermodynamics and the greenhouse effect

There is an exciting new post on here, that discusses a new paper on thermodynamics and the greenhouse effect.  In addition to Gerlich and Tscheuschner and the new paper Hertzberg, et al. (2017), the recent paper Kramm and Dlugi (2011) is interesting.

Yes, indeed, all objects radiate energy if their temperature is above absolute zero.  No question about it.  But, if you place an object that is radiating at 101 degrees C next to an object radiating at 100 degrees C, they will both soon be radiating at 101 degrees C, not 201 degrees C.  A cooler object cannot warm a warmer object, it does not happen, sorry.  The second law of thermodynamics does apply.

“Thermodynamics is a funny subject. The first time you go through it, you don’t understand it at all. The second time you go through it, you think you understand it, except for one or two small points. The third time you go through it, you know you don’t understand it, but by that time you are so used to it, it doesn’t bother you any more. (Physicist Arnold Sommerfeld (1868-1951))”