Breakthrough Institute, 436 14th St., Suite 820, Oakland, CA 94612, USA.
Department of Forest Ecosystems and Society, Oregon State University, 321 Richardson Hall, Corvallis, OR 97331, USA.
Sci Total Environ. 2018 Jan 1;610-611:1207-1209. doi: 10.1016/j.scitotenv.2017.08.125. Epub 2017 Aug 30.
It is well established in the literature that reducing the amount of meat in global diets would reduce the environmental impacts of food production. However, changes to livestock production systems also have significant potential to reduce environmental impacts from meat production, and yet are not as widely discussed in the literature. Modern, intensive livestock systems, especially for beef, offer substantially lower land requirements and greenhouse gas emissions per kilogram of meat than traditional, extensive ones. The land sparing potential of beef sector intensification is especially relevant for high priority conservation regions like the Brazilian Amazon. Leveraging livestock production systems in addition to dietary change greatly expands the opportunity to achieve conservation and climate goals in the coming decades.
文献已经充分证实，减少全球饮食中的肉类摄入量将减少食物生产对环境的影响。然而，改变畜牧业生产系统也具有显著降低肉类生产环境影响的潜力，但在文献中讨论得并不多。与传统的粗放型畜牧业相比，现代密集型畜牧业，尤其是肉牛养殖业，每生产一公斤肉类所需的土地和温室气体排放量要低得多。牛肉部门集约化的土地节约潜力对于巴西亚马逊等高优先级保护区尤为重要。除了饮食改变之外，利用畜牧业生产系统还极大地扩大了在未来几十年内实现保护和气候目标的机会。
