The problems and current lines of development are discussed, concerning the V.I. Vernadsky’s idea about gas breathing of the Earth, in particular, deep gassing processes: the origin of volatiles in the Earth interior; impact of the Earth internal heat liberation on the spatio-temporal degassing features; behavior of fluids and their migration in the Earth interior, explosive phenomena, influence on volcanism and seismicity; their interaction with depth surrounding media; influence on granitization process; atmosphere and hydrosphere formation, role of fluids in hydrocarbon and ore deposits formation.