<prompt> Translate the following text to EnglishKatika nchi za Ulaya, viwanda vya umeme hutokeza kiasi kikubwa cha hewa, asilimia 67 ya uzalishaji wote wa sulfuri dioksidi SO2, asilimia 37 ya uzalishaji wa zebaki, na asilimia 25 ya uzalishaji wote wa oksidi ya nitrojeni NOx.  <response>: In the U.S., power plants emit significant amounts of air 67 percent of all sulfur dioxide SO2 emissions, 37 percent of mercury emissions, and 25 percent of all nitrogen oxide NOx emissions. 