SEMATEC has signed an agreement of accession with the Environmental Forum Foundation to the imposed a project that allows defining a methodology for the calculation of the carbon footprint (project Carbonfeel). Interest in the carbon footprint has led a variety of calculation methodologies that are leading to confusion, indecision and uncertainty. This fact is causing that much of the initiatives are facing unexpected obstacles. Therefore, Carbonfeel aims to provide to the society of a work method for the calculation of the carbon footprint based on actual data accessible, transparent and comparable endowed with a credibility that gives confidence to companies play them all in the same conditions at the same time, this prevents the propagation of an infinite number of seals and certifications from carbon footprints made to measure of the contracting company. In this sense, through the Carbonfeel project to which it has acceded SEMATEC, the proposed methodology will be validated through sectoral pilot projects that it be carried out within the framework of the project. The goal to achieve is the standardization of methodology of calculation, in strict compliance with the existing international standards and, accordingly, also achieving the standardization of the carbon footprint labelling. All this is based on the commitment to build a more sustainable society and committed in the fight against climate change.