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\section{Introduction}  \subsection{Societal background or problem}  Globally, about one-third of food produced for human consumption is lost or wasted, equalling an estimated amount of 1.3 billion tons pear year \cite{gustavsson_global_2011}. The differences between regions are enormous. In Europe and North America, consumers waste around 95-115 kg/year, compared to only 6-11 kg/year in sub-Saharan Africa and South/Southeast Asia. These are the results of a study commissioned by the Food and Agriculture Organization of the United Nations to raise awareness on the dramatic situation of inefficient food utilisation. Food wastage not only poses an ethical dilemma regarding people suffering from hunger but has significant environmental implications: primarily the unnecessary additional  use of land, water,labour  and energy to produce food doomed for spillage. spoilage.  \subsection{Scientific background and previous studies}  % What is the underlying scientific problem and what are the most important contributions in this area?