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\section{Methodology & Methods}  Food loss refers to the decrease in edible food mass throughout the part of the supply chain that specifically leads to edible food for human consumption, i.e. production, post-harvest and processing stages in the food supply chain \cite{20713403}. Food losses are specified and referred to as food wastage if it is related to retailers’ and consumers’ behaviour. This research will exclusively focus on food wastage ocurrence of households who participate in the Dutch campaign \textit{100 100 100}. The campaign was launched by the waste collection management  company \textit{ROVA}, in collaboration with Utrecht University and Groningen University, as an attempt to better quantify the environmental impacts and to understand reasons for wasting behaviour as well as providing solutionsfor solutions for  Dutch households to live 100\% waste-free. reduce their waste production.  Over a time span of 100 days, 50 households are supported by individual coaching to increase proper waste separation and an overall reduction of produced waste. A separate group of 50 households is supported by an online community platform. For both groups, the produced waste is codified, collected and used for a sorting analysis. Aside, each participating household receives a questionnaire. All these sources of information can be accessed for the research and their further use will be explained subsequently. \subsection{Sorting analysis}  In previous studies sorting analyises have been proven an affective effective  method to reveal the most frequently wasted food products, i.e. milk and dairy, bread, vegetables, fruits, sauces, oil and fats \cite{van_westerhoven_bepaling_2013}. In this research the data obtained from the sorting analysis will be used quantify the environmental impacts for each household per product group. The environmental impacts are approximated by the amount of avoidable (a) CO_2 emissions from all supply chain stages prior to consumption, (b) l litres  of freshwater use required for cultivation, (c) km^2 of fertile land required for cultivation. \subsection{Questionnaire}  A Together with Groningen University a  questionnaire has been designedby the faculty of psychology at Groningen University  to gain insights into the behavioural component in relation to waste production and separation. It has been supplemented with the following food waste specific questions: \begin{enumerate}  \item How many times per week do you throw away food?