The study of feedback mechanisms caused by changes in the water vapor, the lapse rate in the troposphere, and cloudiness is carried out with the aid of the 1D radiative-dynamic climate model. The climate warming due to doubling of the CO₂ and a 2% rise in the solar constant is calculated with use of this model. The resulting values of underlying surface heating do not exceed 1.0 K, which is much smaller than those obtained in the framework of the standard 1D radiative-convective models. The results also demonstrate a decrease in the vertical size and the liquid-water content for clouds of the lower layer and, therefore, a decrease in their optical thickness.