Global land use implications of dietary trends
Global land use implications of dietary trends
复制标题
饮食趋势对全球土地利用的影响
作者：
S. Rizvi;C. Pagnutti;Evan D. G. Fraser;C. Bauch;M. Anand
全球粮食安全和农业土地管理是人类必须面对的两个紧迫和密切相关的挑战。我们量化了全球农业土地足迹的变化，如果世界要遵守美国农业部（USDA）提出的膳食指南，同时考虑到进口/出口所引起的土地利用变化，以满足这些指南。我们分析国家、大陆和全球层面的数据。美国农业部的指导方针被认为是对目前美国普通人土地密集型饮食的改进，但尽管如此，我们的研究结果表明，在目前的农业实践中，全球遵守该指导方针将需要10亿公顷的额外土地-大致相当于加拿大的面积。结果还显示，东半球和西半球之间存在很大的差异，许多西半球国家在美国农业部指导饮食下显示净土地节约，而许多东半球国家在美国农业部指导饮食下显示净土地使用增加。我们的结论是，国家膳食指南应制定不仅使用健康，而且全球土地利用和公平的标准。由于全球土地是一种有限的资源，国家饮食指南也需要在国际上协调，就像温室气体排放越来越多地协调一样。
Global food security and agricultural land management represent two urgent and intimately related challenges that humans must face. We quantify the changes in the global agricultural land footprint if the world were to adhere to the dietary guidelines put forth by the United States Department of Agriculture (USDA), while accounting for the land use change incurred by import/export required to meet those guidelines. We analyze data at country, continental, and global levels. USDA guidelines are viewed as an improvement on the current land-intensive diet of the average American, but despite this our results show that global adherence to the guidelines would require 1 gigahectare of additional land—roughly the size of Canada—under current agricultural practice. The results also show a strong divide between Eastern and Western hemispheres, with many Western hemisphere countries showing net land sparing under a USDA guideline diet, while many Eastern hemisphere countries show net land use increase under a USDA guideline diet. We conclude that national dietary guidelines should be developed using not just health but also global land use and equity as criteria. Because global lands are a limited resource, national dietary guidelines also need to be coordinated internationally, in much the same way greenhouse gas emissions are increasingly coordinated.
影响因子：
6.1
作者：
Popkin BM;Adair LS;Ng SW
通讯作者：
Ng SW