In this section, we intend to describe several methodologies for developing carbon footprint analysis for
investment projects. Given the analysed subject, we considered appropriate to study certain methodologies
implemented by other institutions that finance investment projects. Thus, we analyzed the guidelines and
methodologies developed by certain credit institutions and international development agencies. The best
methodologies, containing relevant scientific issues, were considered those developed by the European Investment
Bank (EIB), the European Bank for Reconstruction and Development (EBRD), the World Bank (WB) and the
French Development Agency (AFD).