Department of Administrative Sciences, Federal University of Santa Maria, Santa Maria, Brazil.
J Sci Food Agric. 2023 Jul;103(9):4430-4440. doi: 10.1002/jsfa.12524. Epub 2023 Mar 17.
Efficient land use represents a global challenge in the context of high levels of food loss (FL) and waste (FLW) and increasing greenhouse gas (GHG) emissions from global agricultural activities. This study aimed to estimate the land footprint (LF) associated with FL worldwide. It also estimated the GHG emissions from crop residues and their burning, and their relationship with food loss for the main crops worldwide. The study analyzed data from the Food and Agriculture Organization of the United Nations (FAO) regarding land use, FL, and global GHG emissions from crop residues.
The findings suggest that the average LF associated with FL worldwide is about 69 million ha per year, and the main food items responsible for most of the LF associated with FL are maize, wheat, and rice. The annual average emissions derived from burning crop residues of FL are 48.8 kilotons year of CH and 1.26 kilotons year of N O, and the emission of N O derived from crop residues of FL is about 24.1 kilotons year , considering the three crops.
Food loss implies high levels of LF and GHG emissions, reinforcing the need for proper public and private initiatives worldwide to reduce FL and waste (FLW). Organizations such as the FAO and the Organisation for Economic Co-operation and Development (OECD) should incorporate indicators regarding FLW reduction to evaluate and monitor countries' performance. An international agreement also needs to be addressed to engage the world's nations in the reduction of FLW levels. © 2023 Society of Chemical Industry.
在粮食损失（FL）和浪费（FLW）水平高以及全球农业活动温室气体（GHG）排放不断增加的情况下，提高土地利用效率是全球面临的一项挑战。本研究旨在估算全球粮食损失相关的土地足迹（LF）。还估算了农作物秸秆及其燃烧产生的 GHG 排放，以及它们与全球主要农作物FL 之间的关系。该研究分析了联合国粮食及农业组织（FAO）关于土地利用、FL 和全球农作物秸秆 GHG 排放的数据。
研究结果表明，全球粮食损失相关的平均 LF 约为每年 6900 万公顷，导致 LF 相关的主要粮食作物是玉米、小麦和水稻。FL 燃烧秸秆产生的年平均排放量为 48.8 千吨 CH4 年和 1.26 千吨 N O 年，考虑到这三种作物，FL 秸秆产生的 N O 排放量约为 24.1 千吨年。
粮食损失意味着 LF 和 GHG 排放水平高，这强化了全球需要采取适当的公共和私人举措来减少 FL 和浪费（FLW）。粮农组织（FAO）和经济合作与发展组织（OECD）等组织应纳入有关减少 FLW 的指标，以评估和监测各国的表现。还需要达成一项国际协议，让世界各国参与减少 FLW 水平。© 2023 化学工业协会。
