英文翻譯有關全球暖化 - 暖化

who is looking for what in the new treaty?
請解釋 這種文法是???
Richer developing countries are also likely to be asked to constrain their emissions.If they do making any pledges, they are likely to restrain the growth of emissions rather than making actual cuts. Their commitments are likely to be expressed in terms of a reduction in emissions growth of a certain percentage compared with business as usual, or a reduction in the carbon intensity of their economy.
請指出特殊文法做分析
我看到眼睛脫窗了還是想不透...
感謝各位大大。
Update:
我翻的是這樣，不知道對不對。
一些富有的開發中國家，可能也會被要求限制溫室氣體的排放量。
而一旦他們簽訂條約，就得落實控制，而不是任由惡化。
他們承諾的內容是，確實降低溫室氣體和碳的排放量，同時也維持一定的經濟水平。
Update 2:
您好謝謝你的幫忙
原來我誤意了了~~
但是想請問 那個LIKELY 只能翻可能嗎?
有沒有更順的講法
謝謝