But Smith counters that if you factor in the hidden cost of government corn subsidies, environment degradation, and decreased human heath and animal welfare, grass-fed is the more cost-effective model.
2019年12月六级真题（第三套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
有成本效益的;划算的
Something that is cost-effective saves or makes a lot of money in comparison with the costs involved.