China's food loss and waste embodies increasing environmental impacts

Characterizing and quantifying food loss and waste (FLW) is key to the design of sustainable food systems. Based on field surveys and literature review, this study provides data on FLW in China for several commodities at specific stages of the food supply chain. Associated environmental footprints are also calculated under baseline conditions and for three hypothetical scenarios of FLW reduction, revealing the effectiveness of different intervention levels. Food loss and waste (FLW) hampers global food security, human health and environmental sustainability. However, monitoring and benchmarking FLW reduction is often constrained by the lack of reliable and consistent data, especially for emerging economies. Here we use 6 yr large-scale field surveys and literature data to quantify the FLW of major agrifood products along the entire farm-to-fork chain in China. We show that 27% of food annually produced for human consumption in the country (349 +/- 4 Mt) is lost or wasted; 45% of this is associated with postharvest handling and storage and 13% with out-of-home consumption activities. We also show that the land, water, carbon, nitrogen and phosphorus footprints associated with total FLW are similar to those of a medium-sized country (such as the United Kingdom's in the case of carbon footprint). These results highlight the importance of better primary data to inform FLW reduction actions and ensure food security and sustainability.

Automated summary

Characterizing and quantifying food loss and waste (FLW) is crucial for sustainable food systems. This study in China provides FLW data for various commodities at different stages of the food supply chain, along with associated environmental footprints and effectiveness of FLW reduction scenarios. The research reveals that a significant amount of food is lost or wasted annually in China, with postharvest handling and out-of-home consumption activities being major contributors.