Mogensen Lisbeth, Hermansen John E, Trolle Ellen
Department of Agroecology, Faculty of Technical Sciences, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark.
National Food Institute, DTU, Technical University of Denmark, Kemitorvet, Building 201, DK-2800 Kgs. Lyngby, Denmark.
Foods. 2020 Aug 25;9(9):1176. doi: 10.3390/foods9091176.
There is public focus on the environmental impact, and in particular, the emissions of greenhouse gases (GHG), related to our food consumption. The aim of the present study was to estimate the carbon footprint (CF), land use and nutritional impact of the different beef products ready to eat in different real-life dietary patterns. Beef products accounted for 513, 560, 409 and 1023 g COeq per day, respectively, in the four dietary patterns (Traditional, Fast-food, Green, and High-beef). The total CFs of these diets were 4.4, 4.2, 4.3 and 5.0 kg COeq per day (10 MJ) respectively. The Green diet had almost the same CF as the Traditional and the Fast-food diets despite having the lowest intake of beef as well as the lowest intake of red meat in total. A theoretical substitution of beef with other animal products or legumes in each of these three diets reduced the diets' CF by 4-12% and land use by 5-14%. As regards nutrients, both positive and negative impacts of these substitutions were found but only a few of particular nutritional importance, indicating that replacing beef with a combination of other foods without a significant effect on the nutrient profile of the diet is a potential mitigation option.
公众关注与我们的食物消费相关的环境影响,尤其是温室气体(GHG)排放。本研究的目的是估计不同现实生活饮食模式下即食牛肉产品的碳足迹(CF)、土地利用和营养影响。在四种饮食模式(传统饮食、快餐饮食、绿色饮食和高牛肉饮食)中,牛肉产品每天的碳排放量分别为513、560、409和1023克二氧化碳当量。这些饮食的总碳足迹分别为每天4.4、4.2、4.3和5.0千克二氧化碳当量(10兆焦耳)。绿色饮食的碳足迹与传统饮食和快餐饮食几乎相同,尽管其牛肉摄入量以及红肉总摄入量最低。在这三种饮食中,用其他动物产品或豆类理论上替代牛肉可使饮食的碳足迹降低4-12%,土地利用减少5-14%。在营养方面,发现了这些替代的积极和消极影响,但只有少数具有特殊的营养重要性,这表明用其他食物组合替代牛肉而不对饮食的营养成分产生显著影响是一种潜在的缓解选择。