ArcelorMittal's Human Resources area in Spain has managed to digitize two million documents and avoid the emission of almost 5,000 kilos of CO2 to the atmosphere. The 2 million digitized sheets are stored in the Document Management System. The DMS consists of all those computer applications created for the management of large amounts of documents that, as a whole, are used to track, store, and archive and organize electronic documents and images of paper documents. Now, these documents, in addition to being stored digitally, are properly classified and are easily accessible from anywhere in our geography, with control depending on the role of the person accessing the system, information about use, and with a predefined life for each document that is determined by its environmental categorization. The information digitally transformed since this project started in 2017 comprises a vast series of documents generated by Human Resources, but also contributed by the employees themselves. Five years after making the decision to abandon paper, the benefits are more than evident: storage capacity, higher level of security, indexing, ease of access, retrieval and sustainability.