帮我分析一下下面的句子All this extra methane carries more water vapor i

帮我分析一下下面的句子
All this extra methane carries more water vapor into the upper atmosphere,where it condenses at much higher altitudes to form more clouds that the sun’s rays still strike long after sunset has brought the beginning of night to the surface far beneath them.
在句子尾部,has brought 的主语是什么?
另外,请帮我大概翻译一下这个句子.