text: However, climate scientists and climate models instead falsely assume that the Kirchhoff, Planck, and Stefan-Boltzmann laws can be applied to greenhouse gases and that they behave as blackbodies. Dr. Robitaille shows prior work from Hottel et al demonstrating that the emissivity of both of these greenhouse gases decrease with temperature , the opposite of the climate science assumption that greenhouse gases increase emissivity and absorptivity with temperature. For conservation of energy, emissivity must equal absorptivity for all materials and gases, therefore increases in temperature decrease both emissions and absorption of infraredradiation by the greenhouse gases water vapor and CO2, i.e. they become less 'greenhouse like' gases as temperatures increase, a self-regulatory mechanism that suggests less climate sensitivity to CO2 with increasing temperature.