改变经济管理手段是维护经济体自身利益的客观要求。
To protect the interest of every party, the best way is to change the management methods.
同时，改变经济管理手段也是维护各经济体经济利益的迫切要求。
At the same time, changing management methods is also the urgent demand of protecting the advantage of all parties involved in the economy.
环境税收是一种能够有效促使环境资源价值化和环境外部不经济性内部化的经济管理手段。
Environmental tax is an economic instrument which can make effectively environmental resources valued and external diseconomy internalized.
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