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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 \citep{20713403}. Food losses are specified and referred to as food wastage if the reasons for losses are primarily related to retailers’ and consumers’ behaviour. This research will exclusively focus on food wastage occurrence within households who participate in the Dutch campaign \textit{100 100 100}. The campaign was launched by the waste management company \textit{ROVA}, in collaboration with \textit{Utrecht University} and \textit{Groningen University}, as an attempt to better quantify the environmental impacts of household waste, to understand reasons for wasting behaviour and poor waste separation, as well as provide solutions for the participating households to reduce their waste production. Over a period of 100 days, 50 households are supported by individual coaching to increase proper waste separation and achieve 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. One sorting analysis is performed before the intervention at the beginning of the campaign and one after the intervention at the end of the campaign. Aside, each participating household receives a questionnaire. The detailed use of different methods will be outlined in the following sections.  \subsection{Sorting analysis}  In previous studies sorting analysis have been proven an effective method to find the most frequently wasted food products, i.e. milk and dairy, bread, vegetables, fruits, sauces, oil and fats \citep{van_westerhoven_bepaling_2013,van_westerhoven_2010}. \citep{van_westerhoven_bepaling_2013,van_westerhoven_eindrapport_2010}.  In this research the data obtained from the sorting analysis will be used to analyse quantity and type of the most frequently wasted food products of the 100 households. \subsection{Lifecycle assessment}  The environmental effects of food wastage are quantified by a life cycle assessment for each of the most frequently wasted product groups. The environmental impacts are assessed by four indicators along the food supply chain: (I) CO_2 emissions, (II) water use, (III) fertile land use, (IV) methane (CH_4) emissions. The LCA software SimaPro will be used to model the environmental effects on these four indicators.