单个养殖户的最佳污染水平处于边际环境损害成本等于边际污染控制成本的均衡点处。多个养殖户的最佳污染水平处于各自的边际污染控制成本的均衡点处。在没有政府或第三方介入的情况下,制定一个强制性协议对于实现污染控制的纳什均衡是非常必要的。 The optimal level of pollution for a single farmer is at the equilibrium point where the cost of marginal environmental damage equals the marginal cost of pollution control. The optimal level of pollution for multiple farmers is at the equilibrium point of their respective marginal pollution control costs. In the absence of a government or third party involvement, developing a mandatory agreement is necessary to achieve a Nash equilibrium in pollution control.