Methane from cattle: facing realities in the global south
研究发现全球南方牛肉生产的肠道甲烷排放已占全球总量的79%，而北方排放下降32%；由于南方牛群多在牧场放牧，饲料添加剂效果有限，建议从常规生产力改进入手间接减排。
• Enteric methane emissions from beef in the Global South have grown to constitute 79 percent of the global total. • Meanwhile, enteric methane emissions from beef in the Global North have fallen 32 percent since 1980. • This decline can be traced to improved feed rations, genetic improvements, and better veterinary care. • In the Global South, feed additives are not a promising short-cut to contain emissions, because most animals are still finished on pasture. • Conventional productivity improvements will bring methane abatement indirectly, and are a better place to start.