We note that GHG emissions values for the CNC61 and the CNC64 products are 12.6 kgCO2eq/kgCNC and 16.6 kgCO2eq/kgCNC, respectively, Figure . Unexpectedly, they fail to improve significantly compared to the scenario without acid recycling at ~ 16 kgCO2eq/kgCNC for the two CNC products, see . This is because, although full acid recycling minimizes the impact of sulfuric acid and NaOH, the increased energy consumption causes a growth in GHG emissions from electricity generation. Nevertheless, it is worth noting that the obtained values are much smaller than the reported for the pilot plants at 30~50 kgCO2eq/kgCNC , mainly due to carbon savings of renewable grid in Quebec . The conceptual plant in Quebec is expected to deliver relatively green CNC products, given that CNC61/CNC64 and no/full acid recycling can represent extreme operating conditions.