健康全球饮食有望将农业排放减少85%

伦敦卫生与热带医学院和康奈尔大学等机构联合10个建模团队开展的研究表明，全球转向健康饮食方案可在2050年前产生显著的环保和经济效应1。根据该研究，农业土地用地将减少6%，农业相关土地利用变化产生的净二氧化碳排放可下降85%1。

从生产结构看，这一转变将带来行业内部的重大调整1。全球畜牧业产值预计下降42%（630亿美元），其中反刍动物产值下降70%（274亿美元），全球反刍动物数量减少约4亿头1。与此同时，蔬菜、水果、坚果和豆类生产价值将上升57%（890亿美元）1。

不同地区的经济影响存在显著差异1。美国农业产值下降21%（76亿美元），但作物产值增加20%（40亿美元）1；欧洲农业产值下降35%（190亿美元），其中畜牧业产值下降66%（168亿美元）1；印度农业产值则增加46%（198亿美元），作物产值增加65%（208亿美元）1。

2025年EAT-Lancet Commission报告指出，采纳健康饮食方案每年可预防1500万例过早死亡1。该研究已发表于《自然》期刊，揭示了全球食品系统目前每年产生10万亿至20万亿美元的隐性成本1。

Research from the London School of Hygiene and Tropical Medicine and Cornell University has modeled how a global shift toward healthier eating patterns could substantially reshape agricultural systems by 2050 1. The analysis, conducted by ten modeling teams and published in Nature, reveals that such a dietary transition would reduce net carbon dioxide emissions from agricultural land use changes by 85% 1. Agricultural land use itself would decline by 6%, while the global livestock sector would contract significantly, with production value falling by 42%—equivalent to $630 billion—compared to 2020 levels 1.

The shift would fundamentally alter the composition of farming. Production of ruminant animals including cattle, sheep, and goats would decline by approximately 70% in value ($274 billion), corresponding to a reduction of roughly 400 million animals, while the value of vegetables, fruits, nuts, and legumes would rise by 57% ($890 billion) 1. This transition carries uneven economic consequences across regions and farmers. The United States would experience a 21% reduction in overall agricultural value ($76 billion), though crop production value would increase by 20% ($40 billion), while India's agricultural sector would grow by 46% ($198 billion) with crop value expanding by 65% ($208 billion) 1. Europe would face a 35% decline in agricultural value ($190 billion), with livestock production falling by 66% ($168 billion) 1. The 2025 EAT-Lancet Commission report indicates that such dietary changes could prevent approximately 15 million premature deaths annually, while addressing the current global food system's hidden costs estimated between $10 trillion and $20 trillion per year 1.