碳排放限额的交易能激励公司去寻求最有效率的解决方案。
The trading of emission allowances then gives companies an incentive to seek the most cost-efficient solutions.
这虽然与降低碳排放无关，但是却对包含碳排放限额交易的法案通过不无帮助。
This has nothing to do with reducing carbon emissions, but it might help a bill that does contain carbon caps to pass.
这种方法在碳排放限额交易（cap-and-trade）或碳税体系下可能最为有效。
That would likely work best under a cap-and-trade or carbon tax system.
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