The results show that investment of PTF increases the GDP more than the investment of PTF, large quantity of tax and profit, a lot of opportunity of employment.

 
  • 但是,在实践过程中对许多问题仍缺乏具体和定量的分析,影响着环境与经济协调发展的科学决策,如污染治理对国民经济的定量影响就是其中之一。
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