<prompt> Translate the following text to SwahiliHowever, while we are observing significant environmental improvement, power generation still contributes 67 percent of SO2, 25 percent of NOx, and 37 percent of man-made mercury.  <response>: Hata hivyo, wakati tunaona uboreshaji mkubwa wa mazingira, uzalishaji wa umeme bado unashiriki asilimia 67 ya SO2, asilimia 25 ya NOx, na asilimia 37 ya zebaki ya binadamu. 