虽然174个国家批准了公认存在缺陷的《京都议定书》以降低碳排放水平，但美国和欧盟在这一问题上的分歧依然存在。

Although 174 nations approved the admittedly flawed Kyoto accords to reduce carbon levels, the arguments between the US and the EU on this issue still exist.

youdao

任何希望拥有高于特定排放水平的公司都必须购买许可证。

Any companies wishing to emit above a certain level will need to purchase permits to do so.

youdao

第一，立刻限制美国二氧化碳的排放水平，并在2050年将其减少90%。

First, freeze America's level of carbon dioxide emissions immediately, and then reduce it by 90% by 2050.

youdao

So that's an equivalent of a return to 1990 level of emissions.

这相当于是回到1990年的排放水平。

对全球变暖的政策 - SpeakingMax英语口语达人