Förbättringspotential i Stockholms Gymnasieskolors Matrelaterade Koldioixutsläpp

Sammanfattning: Global warming and climate changes due to greenhouse gas emissions are urgent problems needed to be addressed by leaders, nations, organizations and citizens around the world. In a more global world many western countries import more than they export, resulting that the country in some ways of measuring might be attributed with less greenhouse emissions than it should. For this reason, it is important to measure a country’s carbon footprint by measuring consumption, not only production. Studies show that Sweden is one of those countries. Sweden’s public consumption stands for about 20% of the national carbon emissions. Food in general stands for a substantial part of this public consumption, but there are big variances between different types of foods and diets. In this report, we address the public consumption of Stockholm assessing whether the carbon emissions connected to food served in public high schools differ between schools. We evaluate whether there is a significant difference between the carbon emissions of high schools and discuss whether some of these schools could be a positive influence on others. A hypothetical conclusion of how much carbon emissions could be reduced is drawn. Our study was conducted by building a web based prototype that analyzed purchase data and matched it with LCA data from the open database LCAFDB. We choose to divide the schools into two groups where Group 1 were schools with lower carbon emissions per food and Group 2 were schools with higher emissions per food. The average difference between schools in group 1 and 2 was 1,83 kilograms of carbon per kilogram of food. 71% of the students attended a school in Group 2, meaning that if the schools in Group 2 reduced their emissions to the level of the schools in Group 1, the potential reduction of emitted carbon would be 75,5 kilograms of carbon per student and year. Extrapolated to a national level, the results correspond to 79 000 tons of carbon yearly nationwide, although the selection was not randomly selected. [PC1] The study concludes that there are substantial differences between schools, implying substantial potential improvements.