Global food loss and waste has not abated despite tremendous efforts to reduce it. Food wastage has profound consequences including our inability to combat hunger, contributions to unsustainable resource exploitation, and represents about half of the greenhouse gas emissions of the entire agrifood system. Mitigating the problems for a sustainable future requires managing food waste using the most appropriate approach. Upcycling food waste to animal feed is an essential strategy to capture the greatest value compared with other recycling options. The overall goal of this critical analysis is to provide evidence that upcycling of many food waste sources to animal feed can be successfully achieved in support of sustainable productivity. We describe multiple dimensions of reducing emissions and improving resource utilization efficiency, characterize the suitability of various food waste sources and limitations as animal feed, and describe the needs for de-risking strategies, overcoming legislative bottlenecks, and filling knowledge gaps to accelerate greater use of this high impact sustainability strategy.

尽管为减少粮食损失和浪费付出了巨大努力，但全球粮食损失和浪费并未减少。粮食浪费具有深远的后果，包括我们无法战胜饥饿、导致不可持续的资源开发，并且约占整个农业食品系统温室气体排放量的一半。缓解可持续未来的问题需要使用最合适的方法来管理食物浪费。与其他回收方案相比，将食物垃圾升级为动物饲料是获取最大价值的重要策略。这项关键分析的总体目标是提供证据，证明可以成功实现将许多食物垃圾来源升级为动物饲料，以支持可持续生产力。我们描述了减少排放和提高资源利用效率的多个维度，描述了各种食物垃圾来源的适用性和作为动物饲料的限制，并描述了降低风险策略、克服立法瓶颈和填补知识空白以加速更多利用食物垃圾的需求。这项影响深远的可持续发展战略。