The aims of our study are therefore: 1. to build a benchmark process model for the large-scale CNC production (300 t/a) for two different types of CNCs with and without acid recycling, as well as develop life cycle inventories for them, 2. to integrate the process model with life cycle assessment and quantify the process environmental impacts for a case study in Quebec, Canada, as it is the location of currently the largest CNC manufacturer, and 3. to investigate sensitivity of the environmental impact results to geographical locations for future potential manufacturing sites.