An estimated 30 to 50 % of food produced for human consumption is lost or wasted each year. These global food loss and waste (FLW) annually generate 4.4 Gt CO2-eq, or about 8 % of total anthropogenic greenhouse gas (GHG) emissions, and thus present a still underestimated driver of climate change. To date, little is known about grassroots initiatives dedicated to reducing and preventing FLW and their actual potential to prevent FLW and thus contribution to mitigate GHG emissions. This paper presents a systematic review that examined the peer-reviewed evidence on grassroots initiatives’ potential to limit food waste and GHG emissions. We found 15 relevant studies which represent a small but recent and growing interest in the topic. The findings of the studies are mostly of a qualitative nature, exploring the initiatives’ organizational structure, goals and available resources. This systematic review highlights a pressing need for further research and impact measurement to better assess the role of grassroots initiatives in FLW reduction and climate change mitigation. It raises main directions for future research.

中文翻译：

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通过草根倡议限制食物浪费作为减缓气候变化的潜力：系统评价

据估计，每年有 30% 到 50% 的供人类消费的食物被丢失或浪费。这些全球粮食损失和浪费 (FLW) 每年产生 4.4 Gt 二氧化碳当量，约占人为温室气体 (GHG) 总排放量的 8%，因此仍然是气候变化的一个被低估的驱动因素。迄今为止，人们对致力于减少和预防 FLW 的草根倡议及其预防 FLW 的实际潜力以及对减少温室气体排放的贡献知之甚少。本文提出了一项系统审查，审查了关于草根倡议限制食物浪费和温室气体排放潜力的同行评审证据。我们发现了 15 项相关研究，它们代表了对该主题的小但最近且日益增长的兴趣。研究结果大多是定性的，探索倡议的组织结构，目标和可用资源。本系统综述强调迫切需要进一步研究和衡量影响，以更好地评估基层倡议在减少粮食损失与浪费和减缓气候变化方面的作用。它提出了未来研究的主要方向。