NOVELTY - The method comprises contacting (510) a first region with a catholyte comprising carbon dioxide, contacting (520) a second region with an anolyte comprising a recycled reactant, applying (530) an electrical potential between the anode and the cathode sufficient to produce a first product recoverable from the first region and a second product recoverable from the second region, removing (540) the second product from the second region, introducing (550) the second product to a secondary reactor, and forming the recycled reactant in the secondary reactor.    USE - The method is useful for producing a first product from a first region of an electrochemical cell having a cathode and a second product from a second region of the electrochemical cell having an anode, where the second product is diatomic halide product including bromine (Br2) and the first product includes carbon monoxide, acetic acid, carboxylic acid, formic acid, formaldehyde, methanol, methane, oxalate, oxalic acid, glyoxylic acid, glyoxylate, glycolic acid, glycolate, glyoxal, glycolaldehyde, ethylene glycol, acetic acid, acetate, acetaldehyde, ethanol, ethane, ethylene, lactic acid, lactate, propionic acid, propionate, acetone, isopropanol, 1-propanol, 1,2-propylene glycol, propane, propylene, butane, butene, 1-butanol, 2-butanone, 2-butanol, a carboxylic acid, a carboxylate, a ketone, an aldehyde and an alcohol (all claimed).    ADVANTAGE - The method allows efficient production of the products with high selectivity and reduced carbon dioxide emissions.    DETAILED DESCRIPTION - The method comprises contacting (510) a first region with a catholyte comprising carbon dioxide, contacting (520) a second region with an anolyte comprising a recycled reactant, applying (530) an electrical potential between the anode and the cathode sufficient to produce a first product recoverable from the first region and a second product recoverable from the second region, removing (540) the second product from the second region, introducing (550) the second product to a secondary reactor, and forming the recycled reactant in the secondary reactor. The recycled reactant is a hydrogen halide (HX), where X is fluorine, chlorine, bromine and/or iodine. The reaction in the secondary reactor includes an alkane, alkene, or aromatic compound. The method further comprises forming a halogenated organic compound in the secondary reactor, feeding the halogenated organic compound into a third reactor, feeding water into the third reactor, forming an alcohol and HX in the third reactor, recycling the HX into the second region, forming HX and an alkene and/or an alkyne in the third reactor, recycling the HX into the second region, forming HX and an alcohol, an alkene, an alkyne, an aldehyde, a ketone and/or an alkane in the third reactor, recycling the HX into the second region, and receiving a feed of a recycled reactant at the second region of an electrochemical cell. The anolyte and catholyte comprise water. The catholyte comprises a non-aqueous solvent. The first region and the second region are separated by an ion permeable barrier that operates at a temperature of less than 600 degrees C. The ion permeable barrier includes a polymeric and/or inorganic ceramic-based ion permeable barrier. The catholyte and the anolyte are a gas or a liquid. An INDEPENDENT CLAIM is included for a system for electrochemical co-production of products.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a method for electrochemical co-production of products.    Contacting a first region with a catholyte comprising carbon dioxide (510)    Contacting a second region with an anolyte comprising a recycled reactant (520)    Applying an electrical potential between the anode and the cathode (530)    Removing a second product from the second region (540)    Introducing the second product to a secondary reactor. (550)