Falsification Of The Atmospheric CO2 Greenhouse Effects Within The Frame Of Physics Abstract The atmospheric greenhouse eect, an idea that many authors trace back to the traditional works of Fourier (1824), Tyndall (1861), and Arrhenius (1896), and which is still supported in global climatology, essentially describes a ctitious mechanism, in which a planetary atmosphere acts as a heat pump driven by an environment that is radiatively interacting with but radiatively equilibrated to the atmospheric system. Ac- cording to the second law of thermodynamics such a planetary machine can never exist. Nevertheless, in almost all texts of global climatology and in a widespread secondary literature it is taken for granted that such mechanism is real and stands on a rm sci- entic foundation. In this paper the popular conjecture is analyzed and the underlying physical principles are claried. By showing that (a) there are no common physical laws between the warming phenomenon in glass houses and the ctitious atmospheric green- house eects, (b) there are no calculations to determine an average surface temperature of a planet, (c) the frequently mentioned dierence of 33 C is a meaningless number calculated wrongly, (d) the formulas of cavity radiation are used inappropriately, (e) the assumption of a radiative balance is unphysical, (f) thermal conductivity and friction must not be set to zero, the atmospheric greenhouse conjecture is falsied.