Comparing the carbon footprints of urban and conventional agriculture
Comparing the carbon footprints of urban and conventional agriculture
复制标题
比较城市农业和传统农业的碳足迹
DOI：
10.1038/s44284-023-00023-3
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发表时间：
2024
期刊：
影响因子：
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通讯作者：
Poniży, Lidia
中科院分区：
文献类型：
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作者：
Hawes, Jason K.;Goldstein, Benjamin P.;Newell, Joshua P.;Dorr, Erica;Caputo, Silvio;Fox-Kämper, Runrid;Grard, Baptiste;Ilieva, Rositsa T.;Fargue-Lelièvre, Agnès;Poniży, Lidia
城市农业（UA）是一项被广泛提出的战略，旨在使城市和城市粮食系统更具可持续性。到目前为止，我们还缺乏对UA相对于传统农业的环境绩效的全面评估，早期研究的结果也好坏参半。这是解决城市和UA类型不确定性的第一次大规模研究，在欧洲和美国的73个UA站点使用公民科学将UA产品与传统农场的食物进行比较。结果显示，来自UA的食物的碳足迹是传统农业的六倍（每份420克二氧化碳当量对70克二氧化碳当量）。然而，一些单一用途作物（例如，西红柿）和场地（例如，25%的单独管理的花园）的表现优于传统农业。这些例外情况表明，UA从业者可以通过种植典型的温室种植或空运作物、多年维护UA站点以及利用循环（废物作为输入）来减少对气候的影响。
Urban agriculture (UA) is a widely proposed strategy to make cities and urban food systems more sustainable. Until now, we have lacked a comprehensive assessment of the environmental performance of UA relative to conventional agriculture, and results from earlier studies have been mixed. This is the first large-scale study to resolve this uncertainty across cities and types of UA, employing citizen science at 73 UA sites in Europe and the United States to compare UA products to food from conventional farms. Results reveal that the carbon footprint of food from UA is six times greater than conventional agriculture (420 gCO2e versus 70 gCO2e per serving). However, some UA crops (for example, tomatoes) and sites (for example, 25% of individually managed gardens) outperform conventional agriculture. These exceptions suggest that UA practitioners can reduce their climate impacts by cultivating crops that are typically greenhouse-grown or air-freighted, maintaining UA sites for many years, and leveraging circularity (waste as inputs).