<prompt> Translate the following text to EnglishNchi yetu imefanya maendeleo makubwa katika kupunguza uchafuzi wa hewa katika miongo kadhaa iliyopita, lakini uchafuzi kutoka kwa uzalishaji wa umeme unahitaji kudhibitiwa zaidi.  <response>: Our country has made great progress in reducing air pollution over the last several decades, but pollution from power generation needs to be further controlled. 