BACKGROUNDThe awareness and environmental culture of citizens is expanding at same time that the regulations are stricter. Construction sector contributes with a 35-40% of the total of CO2 emissions, for this, it is the moment to implant the carbon footprint calculation in buildings sector. Calculating carbon footprint enables to value the environmental impact regarding to greenhouse gas emissions in a complete manner, from the cradle to the grave. The first step to manage and reduce CO2 emissions is calculate it, in order to know the importance of this environmental aspect and implementing measures to improving it. To obtain a better understanding of the impact and work on it, it is important to measure CO2 emissions from de design and conception of the building, and according to these measures, knowing the different possibilities of reduce the footprint, doing a building more sustainable and lower-carbon. It is indispensable to make aware of the emissions from the first phases of the project for taking early actions and choosing between the different materials, transports, constructive methods, use during the life of the building, deconstruction systems, reuse, etc., and examine how to contribute to increase or decrease the emissions of the building.Currently, there are numerous studies about the footprint calculating of materials with their Environmental Product Declaration (EPD) and Energy Efficiency (EE) during the useful life of the building, but not during the construction and deconstruction process of it.The idea of this project is to create an Open Educational Resource (OERCO2) where the calculations of CO2 emissions in each phase of the building are unified so that get an overall picture about footprint from the conception of it and decide on each variable of the construction.OBJECTIVES To contribute to overcome the situation described above, the main objectives of OERCO2 are:- Introduce the calculation of the CO2 emissions at all phases of the construction processes as well as concepts related to recycling and reuse.- Increasing the awareness about the climate change.- Provide information about emissions of each element.- Free access to OERCO2 to agents involved in the construction sector (students, AEC professionals, etc.)PRODUCTSThe main results of this project are:- Compilation of European and national regulations of participant countries on CO2 emissions in construction sector.- Report on CO2 emissions and EPD (Environmental Product Declaration) in industries related to construction sector, where they are measured according to a product unit or constructive element (m3, m2, ml, ud, etc.).- Interactive tool for calculation of CO2 emissions for construction processes, where different options, materials, constructive/deconstructive methods, etc. can be chosen.- Web page of the project and OER (Open Educational Resource) where the interactive tool will be hosted, scientific articles, updated information, calculation methodology, related products, European common curricula for a specialised course, training materials, etc.CONSORTIUM AND IMPACTUniversidad de Sevilla (USE) and UNIVERSITATEA TRANSILVANIA DIN BRASOV (UTBV) will guarantee impact of the results among students, enterprises related to construction sector, as well as they will resolve the technical issues of the project. On the other hand, there are large connection between technology centres of the project and business structure, which it will be another important element of the OERCO2 project where all partners will focus on. In addition, technology centres of OERCO2 project has also broad experience in methodologies, CO2 emissions calculation and EPD (Environmental Product Declaration) in its countries, what it is very useful to have a local vision of different procurements.The Romania Green Building Council can make use of its close relationship with national Green Building Councils throughout Europe who would be eager to incorporate best-in-class learning on Lifecycle assessments for materials into their education programs. RoGBC was also a founding partner of Construction21.org - a social media platform for the sustainable construction and real estate practitioners that now includes over 14,000 registered members.