Some of the data included in this report was provided or assessed by external parties... This data is therefore subject to periodic audits. Some of the data published in this report were controlled by students from the University of Antwerp, as part of their theses. In particular, Karel Paternoster, Qian Zhang and Ramya Iyer, Master of Global Management students at the Antwerp Management School, verified the data regarding the production of electricity, CO2 emissions, taxes and contributions, payment plans and staff motivation.