To mitigate environmental problems, in recent decades some countries have developed a variety of market-oriented policy tools, such as environmental taxes, fees, or emission trading.
Transferable emission permit — a pollution control policy requiring each emitter of a pollutant to possess permits for the amount of pollution it releases.
可转让许可系统——污染物控制政策要求每个污染排放源拥有污染排放许可。
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To make a good use of abundant non-gaseous emission, renewable water potentials is an obligatory choice in our energy policy.