Miller and coworkers have discussed the economic feasibility of the direct electrochemical reduction of nitrogen (E-NR) versus the green ammonia synthesized by electrolysis of water in combination with the H-B process. Through their analysis, they found that the direct E-NR was less expensive than the alternative with electrolysis of water and H-B. The assumptions in their analysis of the direct electrochemical nitrogen reduction apply a 95% faradaic efficiency and 0.60 V overpotential for an energy efficiency of 62.2%. Interestingly a recent report by MacFarlane and coworkers demonstrated a nearly 100% faradaic efficiency for the electrochemical reduction of nitrogen at lithium. When a social cost of carbon emissions was applied to the current brown ammonia synthesis, the direct electrochemical reduction of ammonia becomes the most economically feasible route.