<prompt> Translate the following text to EnglishMoja ya sababu ya uzalishaji wa umeme akaunti kwa sehemu kubwa kama ya uzalishaji huu muhimu ni kwamba kupunguza uzalishaji mkubwa tayari imekuwa required kutoka vyanzo vingine.  <response>: One of the reasons power generation accounts for such a large share of These key emissions is that significant emissions reductions have already been required from other sources. 