Food consumption is one of the biggest contributors to climate change. However, online grocery shoppers often lack the time, motivation, or knowledge to contemplate a food's environmental impact. At the same time, they are concerned with their own well-being. To empower grocery shoppers in making nutritionally and environmentally informed decisions, we investigate the efficacy of the Scale-Score, a label combining nutritional and environmental information to highlight a product's benefit to both the consumer's and the planet's health, without obscuring either information. We conducted an online survey to understand user needs and requirements regarding a joint food label, we developed an open-source mock online grocery environment, and assessed label efficacy. We find that the Scale-Score supports nutritious purchases, yet needs improving regarding sustainability support. Our research shows first insights into design considerations and performance of a combined yet disjoint food label, potentially altering the label design space.

翻译：食品消费是气候变化的最大贡献因素之一。然而，在线杂货购物者往往缺乏时间、动力或专业知识来考量食品的环境影响。与此同时，他们又关注自身福祉。为帮助购物者在营养与环境方面做出知情决策，我们研究了Scale-Score标签的有效性。该标签融合了营养与环境信息，突出展示产品对消费者健康与地球健康的双重益处，同时不掩盖其中任一信息。我们通过在线问卷调查了解用户对联合食品标签的需求与要求，开发了一个开源模拟在线杂货购物环境，并评估了标签的有效性。研究发现，Scale-Score能够支持营养性购买，但在可持续性支持方面仍有改进空间。本研究初步揭示了这种既融合又分离的食品标签的设计考量与性能表现，或可能改变标签设计空间。