用新的植物性肉类和牛奶替代品来满足气候和生物多样性目标
Marta Kozicka1, Petr Havlík2, Hugo Valin2
1International Institute for Applied Systems Analysis, Laxenburg, Austria. kozicka@iiasa.ac.at.
Nature communications
|September 12, 2023
概括
转向50%主要动物产品的植物性替代品可以显著减少环境影响. 恢复节省的土地可以使气候效益增加一倍,并帮助实现生物多样性目标.
科学领域:
- 环境科学 环境科学
- 农业经济学 农业经济学
- 气候变化缓解缓解 气候变化缓解
背景情况:
- 对于可持续饮食的日益增长的需求推动了对植物性动物产品替代品的兴趣.
- 评估饮食转变对整个粮食系统的环境影响对于政策制定至关重要.
研究的目的:
- 评估饮食转向植物性动物产品替代品的全球环境影响.
- 量化土地利用,温室气体排放和生物多样性的潜在好处.
主要方法:
- 利用全球经济土地利用模型来模拟饮食变化.
- 在50%的替代方案下分析了对土地使用,农业排放和生态系统完整性的影响.
- 评估了恢复节省农田的额外好处.
主要成果:
- 将猪肉,肉,牛肉和牛奶50%替换为替代品,可以在2050年之前停止净土地转型,并将农业排放量减少31%.
- 恢复节省的土地可以使减缓气候变化的潜力增加一倍,并为全球生物多样性目标做出重大贡献.
- 区域影响不同,中国看到农业投入的变化,撒哈拉以南非洲和南美洲经历了环境结果的转变.
结论:
- 转向植物性替代品的饮食转变为环境带来了巨大的好处,包括减少土地利用和温室气体排放.
- 在节省农业用地的土地恢复为缓解气候变化和保护生物多样性提供了重大机会.
- 当替换多种动物产品时,观察到协同效应,突出显示了全面饮食变化的重要性.
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