The alternative mechanism of the emergence of cosmic microwave background radiation (CMB), associated with the thermal radiation of primordial gas-dust clouds in the early Universe, is considered. The emergence of such clouds in the theory of infinite hierarchical nesting of matter is a natural stage in matter evolution. The mass, radius, and spatial concentration of typical primordial gas-dust clouds, the distance between neighboring clouds, and the power of CMB energy generation per unit volume and per nucleon of the early Universe were calculated. The masses and radii of these clouds correspond to the masses and radii of the observed Bok globules. The presented mechanism is consistent with the cluster model describing the appearance of angular multipoles in the CMB power spectrum. In addition to CMB radiation, cosmic infrared background (CIB) radiation and cosmic optical background (COB) radiation are also considered. According to the presented model, the sources of CIB are primordial protoplanetary clouds. As for the COB radiation, it is associated with the radiation of the first protostars. During evolution, each primordial cloud, with a mass of about 31 solar masses, first generates CMB radiation, and then CIB and COB radiations. Since protostars give rise to neutron stars, the concentration of primordial gas-dust clouds is also the concentration of observed neutron stars. In the course of the calculations, a new definition of the radiation intensity is used, which is based on the vector of the surface energy flux density and accounts for the angles of incidence of radiation on a flat receiver from all sides of the hemisphere. According to Poynting's theorem, the relationship between the intensity and energy density of black body radiation is derived from the concept of photons.