<prompt> Translate the following text to EnglishUtaratibu wa mabadiliko ya gesi ya sulfuri dioksidi na oksidi za nitrojeni kwa sulfati na nitrati, kwa mtiririko huo, huchangia kwa kiasi kikubwa viwango vya mazingira vya chembechembe ndogo.  <response>: Atmospheric transformation of gaseous sulfur dioxide and nitrogen oxides to particulate sulfates and nitrates, respectively, contributes significantly to ambient concentrations of fine particulate matter. 