但是，尽管中国官方持强硬态度，中国的某些环保官员私下对二氧化碳排放失控表示惊讶并且表示，外国绿色关税通过帮助赢得在减排问题上的政治支持而将会在实际上在国内有关温室气体的政策斗争中加强他们的地位。
Despite China’s official hard line, some Chinese environmental officials privately express alarm at run-away carbon emissions, and suggest that foreign green tariffs would actually strengthen their hand in domestic policy struggles over controlling greenhouse gases by helping to win political support for emissions cuts.