NOVELTY - A source of hydrogen comprises a glass shell and a gas comprising at least 80 volume% of hydrogen. The glass shell has an initial permeability to hydrogen gas of less than 50% decrease in pressure in 30 days, and a final permeability to hydrogen of 50% decrease in pressure in few minutes, upon exposure of the glass to a continuous or pulsed fluence of at least 0.1 W/cm of electromagnetic radiation, to modulate the microstructure of the glass network and to increase the hydrogen gas permeability of the glass.    USE - As a source of hydrogen for providing hydrogen gas that provides fuel to fuel cell (claimed) for use as co-generation power plant in hospitals, universities and large office buildings, and for producing electricity.    ADVANTAGE - The new glass systems and glass compositions allow fast and effective hydrogen permeation through the wall of a glass or glass-ceramic microsphere which would permit to eliminate the existing barriers for hydrogen diffusion. The glass compositions exhibit satisfactory permeability of gaseous hydrogen; be able to create glass networks with functional gates generated upon external stimuli; and be capable of trapping and releasing gaseous hydrogen on-demand at conditions close to ambient, what is the requirement for all practical applications of glass spheres. The hydrogen can be stored and distributed using hollow glass microspheres made of specific compositions with efficiencies greater than that of other currently proposed methods-materials-compounds. The source of hydrogen provides fuel cell having improved efficiency.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for providing hydrogen gas involving encapsulating hydrogen gas in a microcapsule having a glass or glass-ceramics shell; exposing the glass shell to electromagnetic radiation of a wavelength and fluence that increases permeability of the shell to hydrogen gas so that encapsulated hydrogen gas permeates through the shell.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the fuel cell.