Abstract: A method of treating acid gas from fuel emissions or ambient air is performed by contacting the acid gas with a highly reactive reductant that has been prepared in a vessel positioned with two electrodes separated by a membrane. An electric potential is applied across the electrodes at a selected voltage and current necessary to generate a strong reductant within the cathodic cell. The reductant is pumped from the cathodic cell to a second vessel. Acid gas from fossil fuel emissions is introduced into the second vessel and upon contacting the cathodic reductant converts into its constituent salt thus sequestering the acid gas within a salt and keeping it from entering the atmosphere. Accordingly, acid gas within ambient gas can be introduced into the second chamber and sequestered in the same manner.