EMISSIONS trading, says Ian Johnson of IDEAcarbon, a research firm, "is not an easy concept to understand".
IDEAcarbon(一个研究公司)的Ian Johnson说,排污权交易这个概念不容易理解。
EMISSIONS trading, says Ian Johnson of IDEAcarbon, a research firm, "is not an easy concept to understand".
IDEAcarbon(一个研究公司)的Ian Johnson说,排污权交易这个概念不容易理解。
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