Combined climate and nutritional performance of seafoods

JOURNAL OF CLEANER PRODUCTION

卷:230

Article

Hallstrom, Elinor¹  Bergman, Kristina¹  Mifflin, Kathleen²  Parker, Robert²  Tyedmers, Peter²  Troell, Max^3,4  Ziegler, Friederike¹ 

[1] RISE Res Inst Sweden, Agrifood & Biosci, POB 5401, S-40229 Gothenburg, Sweden

[2] Dalhousie Univ, Sch Resource & Environm Studies, 6100 Univ Ave,Suite 5010,POB 15000, Halifax, NS B3H 4R2, Canada

[3] Royal Swedish Acad Sci, Beijer Inst Ecol Econ, SE-10405 Stockholm, Sweden

[4] Stockholm Univ, Stockholm Resilience Ctr, Kraftriket 2B, S-10691 Stockholm, Sweden

关键词: Seafood;    Nutrient density;    Climate;    Greenhouse gas emissions;    Life cycle assessment;    Dietary advice;    Nutrition;   

DOI  :  10.1016/j.jclepro.2019.04.229

来源: Elsevier

【 摘 要 】

National authorities in many countries advise their populations to eat more seafood, for health and sometimes for environmental purposes, but give little guidance as to what type of seafood should be consumed. The large diversity in species and production methods results in variability both in the nutritional content and in the environmental performance of seafoods. More targeted dietary advice for sustainable seafood consumption requires a better understanding of the relative nutritional benefits against environmental costs of various types of seafood. This study analyzes the combined climate and nutritional performance of seafood commonly consumed in Sweden, originating all over the world. Nutrient density scores, assessed by seven alternative methods, are combined with species-technology- and origin-specific greenhouse gas emission data for 37 types of seafood. An integrated score indicates which seafood products provide the greatest nutritional value at the lowest climate costs and hence should be promoted from this perspective. Results show that seafoods consumed in Sweden differ widely in nutritional value as well as climate impact and that the two measures are not correlated across all species. Dietary changes towards increased consumption of more seafood choices where a correlation exists (e.g. pelagic species like sprat, herring and mackerel) would benefit both health and climate. Seafoods with a higher climate impact in relation to their nutritional value (e.g. shrimp, Pangasius and plaice) should, on the other hand, not be promoted in dietary advice. The effect of individual nutrients and implications of different nutrient density scores is evaluated. This research is a first step towards modelling the joint nutritional and climate benefits of seafood as a concrete baseline for policy-making, e.g. in dietary advice. It should be followed up by modelling other species, including environmental toxins in seafood in the nutrition score, and expanding to cover other environmental aspects. (C) 2019 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free