<prompt> Translate the following text to EnglishBaadhi ya mifano hii imetumika kusaidia maendeleo ya mipango ya hewa safi ya shirikisho, masomo ya tathmini ya kitaifa, mipango ya utekelezaji wa serikali SIPs, na tathmini za hatari za chanzo cha sumu ya hewa.  <response>: Some of these models have been employed in support of the development of federal clean air programs, national assessment studies, State Implementation Plans SIPs, and individual air toxic source risk assessments. 