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- Colombo, P. E.Karolinska Institutet (author)
Optimizing School Food Supply: Integrating Environmental, Health, Economic, and Cultural Dimensions of Diet Sustainability with Linear Programming
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-08-21
- MDPI AG,2019
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- LIBRIS-ID:oai:gup.ub.gu.se/284959
- https://gup.ub.gu.se/publication/284959URI
- https://doi.org/10.3390/ijerph16173019DOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-39921URI
- http://kipublications.ki.se/Default.aspx?queryparsed=id:141913573URI
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- Language:English
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- There is great potential for reducing greenhouse gas emissions (GHGE) from public-sector meals. This paper aimed to develop a strategy for reducing GHGE in the Swedish school food supply while ensuring nutritional adequacy, affordability, and cultural acceptability. Amounts, prices and GHGE-values for all foods and drinks supplied to three schools over one year were gathered. The amounts were optimized by linear programming. Four nutritionally adequate models were developed: Model 1 minimized GHGE while constraining the relative deviation (RD) from the observed food supply, Model 2 minimized total RD while imposing stepwise GHGE reductions, Model 3 additionally constrained RD for individual foods to an upper and lower limit, and Model 4 further controlled how pair-wise ratios of 15 food groups could deviate. Models 1 and 2 reduced GHGE by up to 95% but omitted entire food categories or increased the supply of some individual foods by more than 800% and were deemed unfeasible. Model 3 reduced GHGE by up to 60%, excluded no foods, avoided high RDs of individual foods, but resulted in large changes in food-group ratios. Model 4 limited the changes in food-group ratios but resulted in a higher number of foods deviating from the observed supply and limited the potential of reducing GHGE in one school to 20%. Cost was reduced in almost all solutions. An omnivorous, nutritionally adequate, and affordable school food supply with considerably lower GHGE is achievable with moderate changes to the observed food supply; i.e., with Models 3 and 4. Trade-offs will always have to be made between achieving GHGE reductions and preserving similarity to the current supply.
Subject headings and genre
- MEDICIN OCH HÄLSOVETENSKAP Hälsovetenskap Näringslära hsv//swe
- MEDICAL AND HEALTH SCIENCES Health Sciences Nutrition and Dietetics hsv//eng
- nutrition
- children
- greenhouse gas emissions
- school meals
- sustainability
- Agenda 2030
- greenhouse-gas emissions
- high nutritional quality
- self-selected diets
- cost constraint
- energy density
- impact
- contribute
- vegetarian
- choices
- meat
- Environmental Sciences & Ecology
- Public
- Environmental & Occupational
- Health
- Agenda 2030
Added entries (persons, corporate bodies, meetings, titles ...)
- Patterson, E. (author)
- Elinder, L. S.Karolinska Institutet (author)
- Lindroos, Anna-Karin,1958Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition,Institute of Medicine, Department of Internal Medicine and Clinical Nutrition,Gothenburg University, Sweden(Swepub:gu)xlannw (author)
- Sonesson, UlfRISE,Jordbruk och livsmedel(Swepub:ri)ulfso@ri.se (author)
- Darmon, N.University of Montpellier, France (author)
- Parlesak, A.University College Copenhagen, Denmark (author)
- Karolinska InstitutetInstitutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition (creator_code:org_t)
Related titles
- In:International Journal of Environmental Research and Public Health: MDPI AG16:171660-46011661-7827
Internet link
- https://www.mdpi.com/1660-4601/16/17/3019/pdf
- https://doi.org/10.3390/ijerph16173019Fulltext
- https://www.mdpi.com/1660-4601/16/17/3019
- https://gup.ub.gu.se/publication/284959
- https://doi.org/10.3390/ijerph16173019
- https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-39921
- http://kipublications.ki.se/Default.aspx?queryparsed=id:141913573
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