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Optimizing School F...
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Colombo, P. E.Karolinska Institutet
(författare)
Optimizing School Food Supply: Integrating Environmental, Health, Economic, and Cultural Dimensions of Diet Sustainability with Linear Programming
- Artikel/kapitelEngelska2019
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LIBRIS-ID:oai:gup.ub.gu.se/284959
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https://gup.ub.gu.se/publication/284959URI
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https://doi.org/10.3390/ijerph16173019DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-39921URI
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http://kipublications.ki.se/Default.aspx?queryparsed=id:141913573URI
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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.
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Patterson, E.
(författare)
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Elinder, L. S.Karolinska Institutet
(författare)
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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
(författare)
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Sonesson, UlfRISE,Jordbruk och livsmedel(Swepub:ri)ulfso@ri.se
(författare)
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Darmon, N.University of Montpellier, France
(författare)
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Parlesak, A.University College Copenhagen, Denmark
(författare)
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Karolinska InstitutetInstitutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:International Journal of Environmental Research and Public Health: MDPI AG16:171660-46011661-7827
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