For energy sources besides the emission factor corresponding to fuel
Emission factors of construction materials used were managed with a breakdown structure with three phases: the first considers upstream emissions prior to final manufacturing (in extraction of raw materials, auxiliary transportation, intermediate manufacturing, storage, etc.); the production phase split into emissions related to AS 19 consumed per unit of material (electricity and fuel consumption) and energy independent emissions, known as process emissions, generated by chemical reactions; and the in-situ phase comprises emissions or sequestrations of GHG by the materials located in their final destination in the infrastructure (such as carbonation of cement and concrete) at the maintenance stage. In this context, other GHGs that can be generated in these processes (such as CF4, C2F6 or SF6) are also considered, following criteria applied in national inventories of GHG emissions (IPCC, 2006). Similarly, in the case of waste, we considered the component related to energy consumption in its management, as well as GHG emission or sequestration generated during waste processing or after its disposal in a landfill.