Smith counters that if you factor in the hidden cost of government corn subsidies, environment degradation, and decreased human health and animal welfare, grass-fed is the more cost-effective model.

史密斯反驳说，如果你把政府玉米补贴、环境恶化、人类健康和动物福利下降的隐性成本考虑进去，草饲是更划算的模式。