尽管联邦的碳排放总量管制与排放交易系统可能会是一个冒险，但我们可以考察一下这一理念在各州是如何发挥作用的，有很多州的作法已经遥遥领先于华盛顿。

Though a federal cap-and-trade system for carbon would largely be a foray into the unknown, we can examine how the idea is working in the states, many of which are far ahead of Washington.

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最好的是设定一项碳排放税，此税相比“总量管制和排放交易体系”更不容易受商业游说的影响。

Best of all, set a carbon tax, which is less susceptible to capture by business lobbies than is a cap-and-trade system.

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建议通过基于市场的总量管制与排放交易系统，到2050年将碳排放量削减80%。

Proposes reducing carbon emissions by 80 percent by 2050 by using a market-based cap-and-trade system.

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