The Viennese food scientist Hanni Rützler examines this question. Her thesis is that food production should not be understood as big business if everyone on earth is to have enough to eat.Instead, traditional and new forms of agriculture should co-exist - fields on the one hand, urban farming on the other. And how about insects as an alternative source of protein? How realistic are these expectations? DW’s Maria Lesser spoke to Hanni Rützler.