This study retrieved 11 surveys, including 3 from legal proficients, 4 from resource management proficients, and 4 from environmental trust-executing proficients, and almost all the proficients believe that Trust Law and Tax Law in Taiwan need to be amended to increase the willingness of the public to dedicate in environmental trusts. Among them, the taxation system and the regulatory and organization system are the most in need of amendment and adjustment. The amendment of the law should be accelerated to achieve the core values of trust with "mutual trust" as its essence.
This study suggests that when using such Contingent Ranking Method (CVM) or Contingent Valuation Method (CVM) to evaluate environmental laws or policies, the similarities and differences of characteristics between interdisciplinarity should be taken into consideration. Between environmental economics, which simplifies the problem and gets results, and environmental law and environmental policy, which require rigorous design and discussion to come up with feasible solutions, in addition to using quantitative methods to present the most intuitive results with data, we should get more qualitative suggestions from proficients and refer to them in order to design questionnaires and results that can achieve both benefits and feasibility. This study also looks forward to more research using interdisciplinary methods in the future, so as to more accurately design a complete set of mechanisms to achieve the greatest benefits for the general public.