“限塑令”：外部性的法律矫正

限制使用塑料袋有利于节约资源，保护生态环境，符合卡尔多-希克斯效率。限制使用塑料袋，政府应当发挥主导作用，综合运用多种手段减少非环保塑料袋的生产和使用。我国推行“限塑令”符合社会现实和法经济学理论，有利于减少非环保塑料袋的使用，塑造良好的环保氛围。“限塑令”应当以“禁令”为主，完善配套制度，同时为厂家、商家和消费者设定公平的环保义务。

Plastic Limit Order: Legal Correction of the Externalities

The Restriction on the use of plastic bags is conducive to saving resources and protecting the environment,and it's also fits for Kaldor-Hicks-Efficiency.The government should play a leading role and use various means to reduce the production and use of non-green plastic bags.China's implementation of "Plastic limit order" is in line with social reality and law and economics theory.It is helpful to reduce the use of non-green plastic bags,and shaping a good atmosphere for environmental protection."Plastic limit order" should be a "ban" as the mean measure,improve the supporting systems,as well as set fair environmental obligations for factories,businesses and consumers.