“…In order to obtain a sustainable biofuel production, the cultivation of bioenergetics crops should not replace that of edible feedstock (Balat, 2011) nor take place on arable land (Dismukes et al, 2008). On the contrary, the use of biological waste and crops from non-arable land should be promoted (Gomez et al, 2008;Jefferson, 2008) (second and third generation biofuels), maintaining the economic competitiveness of the production processes (Hill et al, 2006).…”