<prompt> Translate the following text to SwahiliThe preamble discusses the alternatives considered and why EPA believes that the alternative selected is the least costly and least burdensome consistent with the requirements of the Clean Water Act and the Clean Air Act.  <response>: Kwanza, Mabadiliko yaliyochukuliwa na kwa nini EPA inaamini kwamba mbadala uliochaguliwa ni wa gharama nafuu na wa chini wa mzigo unaopatana na mahitaji ya Sheria ya Maji Safi na Sheria ya Hewa Safi. 