碳税或总量控制和排放权交易制度的设计、谈判和实施工作要耗费数年时间，报告补充说。

A carbon tax or cap and trade system will take years to design, negotiate and implement, it adds.

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各国应考虑实行全球碳税或“总量控制和排放权交易”制度，即允许各国排放一定数量的二氧化碳或将排放权出售给其他国家的制度。

Nations should instead consider a global carbon tax or a “cap and trade” system that would allow countries to emit a given amount of CO2 or sell permits to other countries.

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正如大家所知的那样，利伯曼—华纳提案(Lieberman - Warner)要求到2012年将碳排放量控制在2005年的水平，到2050年碳排放量降至2005年的70%。

Lieberman-Warner, as it's known, calls for cutting carbon from most sources to 2005 levels by 2012 and then 70% below 2005 levels by 2050.

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