In accordance with the GHG Protocol's definitions, the types of emissions considered in the model were as follows: scope 1 (direct GHG emissions), scope 2 (indirect GHG emissions from purchased energy, such as electricity and steam), and scope 3 (other indirect GHG emissions) category 1 (purchased goods and services) and category 12 (end-of-life treatment of sold products). The GHGs considered in the model were carbon dioxide (CO2) and methane (CH4).