He favours a voluntary cap-and-trade system for curbing carbon emissions, which is like arguing for a voluntary income tax.

他赞成用一种自愿的碳交易体制来降低碳排放，这有些像自愿为自己的收入纳税。

youdao

Congress seems determined that a proposed cap-and-trade system for carbon emissions, which Mr Obama was counting on to raise hundreds of billions of dollars, will raise only a fraction of that.

虽然奥巴马曾指望靠“二氧化碳排放总量管制和交易系统”来筹集大笔大笔的资金，但似乎国会笃定这一提案所能筹得的只是杯水车薪而已。

youdao

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

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%。

youdao

However, in a cap and trade or permit system the limit on emissions is the number of permits, the cap.

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