How did this project against food waste in schools come about? 

"It all started with a slice of bread."

"We saw a group of children who were eating in one of our dining rooms. And there was more bread left over than there were students in the lunchroom. They were only eating the centre part of the slice of bread."

"So then we thought tha we had to do something."



While a large part of the world’s population has to live with scarce resources, at home we throw away a lot of food that could be taken advantage of.

Throwing food away, besides wasting the natural, technical, and human resources necessary for its production, also means generating waste, as well as its impact and the additional costs involved in waste disposal. So when it comes to preventing waste, we are talking about much more than taking full advantage of food. We’re talking about a responsible, critical attitude towards consumption and an effort to reduce the amount of waste we produce.

We understand time in school lunchrooms to be an educational opportunity to acquire healthy eating habits and social skills. We have the opportunity to raise the awareness of future generations regarding sustainable models. So we saw the opportunity of setting up the Weigh and Think project as a tool for developing a critical awareness of food consumption and a proactive attitude towards reducing food waste and waste production in general.

A pilot test was carried out from January to June, 2014. Starting the second month, and in a sustained manner, we achieved a reduction of 35% in food waste and 50% in the production of waste. Since then, the project has been implemented in schools in Catalonia.


Children, the driving force behind the change towards responsible consumption

  • 22 / 30.11.2015. The Weigh and Think Project participated as an activity in the 6th European Week for Waste Reduction, from 22nd to 30th November, 2014.
  • 02.2015. The Waste Agency presented the activity to represent Catalonia for the European Waste Reduction Award in the business category.
  • 05.2015. The Weigh and Think Project is presented at the Forum of the Catalonia Network of Schools for Sustainability in Terrassa.

Over the course of the 2014-2015 school year over 3000 children participated in this activity for schools in the Vallès Occidental, Baix Llobregat, Anoia, Penedès and Barcelonès counties.

  • 05.2015. The project was a finalist in the European Week of Waste Reduction Awards, after an independent jury of European specialists gave their verdict in Budapest.
  • 09.2015. The organisers of the Semaine Européenne de la Réduction des Déchets (SERD) in the Île-de-France region chose the project as a case of good practices.
  • 10.2015. The Weigh and Think experiment participated in the conference organised by BASF to seek solutions for more responsible food consumption.
  • 11.2015. The project carried out at the Sant Domènec de la Ràpita School received the Green Schools Award 2015.
  • 05.2016. The Ramon y Cajal School in Barcelona presented the data gathered with the Weigh and Think Project at a conference of the School + Sustainable program (previously School Agenda 21).
  • 02.2017. A group of students from the Mercè Rodoreda School in Martorell participated in the Forum of the Catalonia Network of Schools for Sustainability with the project.

Latest news

Weigh and Think in the media

Interest in food waste. The children and youth news program at children's television channel Super 3 and the Trend section of the La Vanguardia newspaper explained the process involved in setting the project up in a school lunchroom.

Pesa i Pensa - l'Info K

Pesa i Pensa - l'Info K

Pesa i Pensa - La Vanguardia

Pesa i Pensa - La Vanguardia