around four main pillars: promotion of eco-efficient solutions (growth of in 2011) and renewable energy (growth of 45% in revenue derived from the wind energy market in 2011); reduction of the group’s environmental footprint (increase of 12% in the volume of waste recycled); improvement in the management of CSR performance (the international GHG Protocol is used to monitor CO 2 emissions); and commitment to employees and the communities in which the group operates.