Because of shortcomings in the first three types of public intervention enumerated above, economists and others have shown increasing interest in effluent charges and marketable discharge permits.

 
  • 由于以上列举的三种公共干预的缺点,经济学家和其他一些人,已经对排污收费和排污许可的可购买性表现出日益增高的兴趣。
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