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I collected the responses from two different household groups.   Throughout this work I refer to these two groups as the (1) "100-100-100" and the (2) "ordinary household" group.   The 100-100-100 group consisted of households that voluntarily participated in the public engagement campaign "[100-100-100](100-100-100.nl)" which was launched between 01.01.2015 - 10.04.2015 with the aim to identify the potentials and obstacles to reduce residual waste in households and improve the residual waste sorting quota.   Households were able to participate by registering on the platform [100-100-100.nl](100-100-100.nl). Throughout the campaign participating households provided data in the form of: (1) quantitative responses to three questionnaires TODO: footnote; questionnaires[^1];  (2) waste quantities and types in two sorting analyses TODO: foodnote 2; analyses[^2];  (3) and publicly available open-ended text responses on the platform website. [^1] For more information, please contact [Leonie Vrieling](mailto:[email protected]) from University Groningen who analyzed the data to study environmental self-identity and spillovers in pro-environmental behavior.  [^2] For more information, please contact [Bas van Zuijlen](mailto:mailto:[email protected]) from Utrecht University who performed an in-depth environmental impact analysis.  Participants submitted the open-ended responses in response to two food-specific challenges. For both challenges participants were given one week time to provide their response in form of a post on the platform website. The challenge questions were:  1. Which food products do you still have in your fridge? TODO: *Dutch question* *Welke voedselproducten heb jij nog in de kast liggen?*  2. What is your best leftover recipe? TODO: *Dutch question* *Wat is jouw beste kliekjesrecept?*  In total, I collected 94 open-ended responses from the platform website.   The following figure shows an example response which was taken from the platform website.