<prompt> Translate the following text to EnglishKatika Marekani, uzalishaji wa umeme ni wajibu kwa 63 ya sulfuri dioksidi SO2, 22 ya oksidi nitrojeni NO2 na 37 ya man-made mercury iliyotolewa katika mazingira.  <response>: In the United States, power generation is responsible for 63 of sulfur dioxide SO2, 22 of nitrogen oxides NOx, and 37 of man-made mercury released to the environment. 