3.1.1.7. The surface use (SU). For the SU, the most significant contribution is assigned by the diet processing during crop harvesting.As was the case with the other impact categories, impact associated to CR is clearly more important. In fact, the production of 1 tonne of sea bass requires 4940 m2/year for CR and just 4260 m2/year for TR. It is important to underline that the surface occupied by tanks infrastructure is negligible when compared with diet contribution (Fig. 10).