In this work, the emission factor is defined as the GHG emission in generating a material (per ton) or a utility (per GJ). In the proposed industrial park, two 500 MW power stations generate electricity by natural gas combined cycle (NGCC) technology. When no carbon capture is applied, as shown in Equation S.25, the emission factor per unit of electricity generation is calculated by the sum of emissions in generating raw materials (NG, water) together with the direct emissions. As such, the emission factor of NGCC electricity is calculated as 0.41 kg #$ ! 4T /kWh, which falls in the range reported by Weisser. 19