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.
欧盟年均排放量限额是那个时期—2.04亿万吨的二氧化碳排放。
The EU average annual emissions cap for that period is 2.04 billion tons of carbon dioxide.
欧盟年均排放量限额是那个时期—2.04亿万吨的二氧化碳排放。
The EU average annual emissions cap for that period is 2.04 billion tons of carbon dioxide.
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