Another method is the emissions trading system.

另一种方法是排污权交易制度。

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Critics of emissions trading will undoubtedly say the US is better off without it.

毫无疑问，排放交易计划的批评者会说，美国最好不搞这个。

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Critics of emissions trading will undoubtedly say the US is better off without it.

毫无疑问，排放交易计划的批评者会说，美国最好不搞这个。

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