The electrolysis of dirty ices constituting massive envelopes of Ganymede-like bodies is shown to be crucial for understanding of (explosive) origin and manifestations of different types of minor bodies and related objects in the inner Solar System. Moreover, the magneto-electrochemical processes in the Galilean satellites' en-semble were, possibly, responsible for incipiency of life in its known forms. To prevent dramatic consequences for the Earth of probable explosion of yet intact Callisto's electrolyzed ice envelope, one has to attach the highest priority to exploration of this satellite.